diff --git a/.eslintignore b/.eslintignore
new file mode 100644
index 00000000..cea5c785
--- /dev/null
+++ b/.eslintignore
@@ -0,0 +1,4 @@
+**/node_modules/**
+**/lib/**
+**/example/**
+packages/light.js/example-react
diff --git a/.eslintrc.js b/.eslintrc.js
new file mode 100644
index 00000000..0f2da7da
--- /dev/null
+++ b/.eslintrc.js
@@ -0,0 +1,30 @@
+module.exports = {
+  parser: '@typescript-eslint/parser',
+  parserOptions: {
+    ecmaVersion: 2018,
+    sourceType: 'module',
+  },
+  plugins: ['@typescript-eslint'],
+  extends: [
+    'semistandard',
+    'plugin:@typescript-eslint/recommended'
+  ],
+  rules: {
+    '@typescript-eslint/camelcase': ['error', { allow: ['keccak_256'] }],
+    '@typescript-eslint/no-unused-vars': [1, { argsIgnorePattern: '^_' }],
+
+    // TODO: Remove all of these disabled rules.
+    '@typescript-eslint/ban-ts-ignore': 'off',
+    '@typescript-eslint/explicit-function-return-type': 'off',
+    '@typescript-eslint/no-explicit-any': 'off',
+  },
+  overrides: [
+    {
+      files: ['*.spec.{ts,tsx}', 'testHelpers.ts'],
+      env: {
+        jest: true,
+      },
+      plugins: ['jest'],
+    },
+  ],
+};
diff --git a/.prettierrc.js b/.prettierrc.js
new file mode 100644
index 00000000..d161a2a5
--- /dev/null
+++ b/.prettierrc.js
@@ -0,0 +1,7 @@
+module.exports = {
+  printWidth: 80,
+  semi: true,
+  singleQuote: true,
+  tabWidth: 2,
+  trailingComma: 'es5',
+};
diff --git a/.travis.yml b/.travis.yml
index a768dadd..edc4de6f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,6 +13,7 @@ node_js:
   - '10'
 script:
   - yarn lint
+  - yarn typecheck
   - yarn test:api
   - yarn test --silent --coverage --coverageReporters=text-lcov | coveralls ; test ${PIPESTATUS[0]} -eq 0
 before_deploy:
diff --git a/README.md b/README.md
index dc91aef9..08f2ba1a 100644
--- a/README.md
+++ b/README.md
@@ -75,10 +75,10 @@ yarn outdated
 git checkout -b <INSERT_YOUR_BRANCH_NAME>
 ```
 
-5. Run tests, linting, and build
+5. Run tests, type checking, linting, and build
 
 ```bash
-yarn test; yarn lint; yarn build
+yarn test; yarn typecheck; yarn lint; yarn build
 ```
 
 6. Push the branch to your fork of the repo
diff --git a/package.json b/package.json
index 9428bd10..b015029d 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,9 @@
   },
   "scripts": {
     "build": "lerna exec yarn build --stream",
-    "lint": "tslint 'packages/**/*.ts'",
+    "typecheck": "lerna exec yarn typecheck --stream",
+    "lint-files": "FILES='packages/*/**/*.{ts,tsx}' && ./scripts/lint-files.sh $FILES",
+    "lint": "yarn lint-files",
     "postinstall": "yarn build",
     "test": "jest",
     "test:api": "cd packages/api && yarn test",
@@ -31,12 +33,23 @@
   },
   "devDependencies": {
     "@types/jest": "^24.0.13",
+    "@typescript-eslint/eslint-plugin": "^2.2.0",
+    "@typescript-eslint/parser": "^2.2.0",
+    "eslint": "^6.3.0",
+    "eslint-config-semistandard": "^15.0.0",
+    "eslint-config-standard": "^14.0.0",
+    "eslint-import-resolver-typescript": "^1.1.1",
+    "eslint-plugin-import": "^2.18.2",
+    "eslint-plugin-jest": "^22.17.0",
+    "eslint-plugin-json": "^1.4.0",
+    "eslint-plugin-node": "^9.1.0",
+    "eslint-plugin-promise": "^4.2.1",
+    "eslint-plugin-standard": "^4.0.0",
     "jest": "^24.8.0",
     "lerna": "^3.4.3",
+    "prettier": "^1.18.2",
     "rimraf": "^2.6.2",
     "ts-jest": "^24.0.0",
-    "tslint": "^5.10.0",
-    "tslint-config-semistandard": "^7.0.0",
     "typedoc": "^0.14.2",
     "typedoc-plugin-markdown": "^1.1.13",
     "typescript": "^3.1.6"
diff --git a/packages/abi/package.json b/packages/abi/package.json
index e9ae22e3..42ea3118 100644
--- a/packages/abi/package.json
+++ b/packages/abi/package.json
@@ -17,6 +17,7 @@
   "scripts": {
     "docs": "typedoc",
     "prebuild": "rimraf lib",
+    "typecheck": "tsc --noEmit",
     "build": "tsc",
     "test": "jest"
   },
diff --git a/packages/abi/src/decoder/decoder.ts b/packages/abi/src/decoder/decoder.ts
index f4f5b086..eacf7e54 100644
--- a/packages/abi/src/decoder/decoder.ts
+++ b/packages/abi/src/decoder/decoder.ts
@@ -59,7 +59,7 @@ class Decoder {
   static decodeParam (
     param: ParamType,
     slices: Slices,
-    offset: number = 0
+    offset = 0
   ): DecodeResult {
     if (!isInstanceOf(param, ParamType)) {
       throw new Error('param should be instanceof ParamType');
diff --git a/packages/abi/src/encoder/encoder.ts b/packages/abi/src/encoder/encoder.ts
index 1dadc2ce..3bce587c 100644
--- a/packages/abi/src/encoder/encoder.ts
+++ b/packages/abi/src/encoder/encoder.ts
@@ -83,9 +83,7 @@ class Encoder {
       }
     } catch (e) {
       throw new Error(
-        `Cannot encode token #${index} [${token.type}: ${token.value}]. ${
-          e.message
-        }`
+        `Cannot encode token #${index} [${token.type}: ${token.value}]. ${e.message}`
       );
     }
 
diff --git a/packages/abi/src/encoder/mediate.ts b/packages/abi/src/encoder/mediate.ts
index 06ec51b7..ee1a6655 100644
--- a/packages/abi/src/encoder/mediate.ts
+++ b/packages/abi/src/encoder/mediate.ts
@@ -123,6 +123,7 @@ class Mediate {
           .join('');
 
       case 'array':
+        /* eslint-disable no-case-declarations */
         const prefix = padU32((this._value as Mediate[]).length);
         const inits = (this._value as Mediate[])
           .map((mediate: Mediate, index: number) =>
@@ -146,6 +147,7 @@ class Mediate {
               .toString(16)
           )
           .join('');
+        /* eslint-enable no-case-declarations */
 
         return `${prefix}${inits}${closings}`;
     }
diff --git a/packages/abi/src/types.ts b/packages/abi/src/types.ts
index 1058a0e3..2e022a7b 100644
--- a/packages/abi/src/types.ts
+++ b/packages/abi/src/types.ts
@@ -88,7 +88,7 @@ export type ArrayValue = FixedArrayValue[];
 
 export type TokenValue =
   | AddressValue
-  | Boolean
+  | boolean
   | BytesValue
   | StringValue
   | IntValue
diff --git a/packages/abi/src/util/pad.ts b/packages/abi/src/util/pad.ts
index 32a5ea5f..298cebff 100644
--- a/packages/abi/src/util/pad.ts
+++ b/packages/abi/src/util/pad.ts
@@ -91,6 +91,7 @@ export const stringToBytes = (input: BytesValue) => {
 export const padBytes = (input: BytesValue) => {
   const inputBytes = stringToBytes(input);
 
+  // eslint-disable-next-line @typescript-eslint/no-use-before-define
   return `${padU32(inputBytes.length)}${padFixedBytes(inputBytes)}`;
 };
 
diff --git a/packages/abi/src/util/signature.ts b/packages/abi/src/util/signature.ts
index 264f0e0c..a8c2c8ae 100644
--- a/packages/abi/src/util/signature.ts
+++ b/packages/abi/src/util/signature.ts
@@ -15,6 +15,7 @@ export const eventSignature = (
   eventName: string | undefined,
   params: ParamType[] = []
 ) => {
+  // eslint-disable-next-line @typescript-eslint/no-use-before-define
   const { strName, name } = parseName(eventName);
   const types = (params || []).map(fromParamType).join(',');
   const id = `${strName}(${types})`;
diff --git a/packages/abi/src/util/types.spec.ts b/packages/abi/src/util/types.spec.ts
index 1b6502cc..a14f997a 100644
--- a/packages/abi/src/util/types.spec.ts
+++ b/packages/abi/src/util/types.spec.ts
@@ -49,6 +49,7 @@ describe('util/types', () => {
 
   describe('isInstanceOf', () => {
     it('correctly identifies build-in instanceof', () => {
+      // eslint-disable-next-line no-new-wrappers
       expect(isInstanceOf(new String('123'), String)).toBe(true);
     });
 
diff --git a/packages/abi/src/util/types.ts b/packages/abi/src/util/types.ts
index 5ee5fb94..14787222 100644
--- a/packages/abi/src/util/types.ts
+++ b/packages/abi/src/util/types.ts
@@ -35,6 +35,7 @@ export function isFunction (input?: any): input is Function {
 }
 
 export function isHex (input?: any): boolean {
+  // eslint-disable-next-line @typescript-eslint/no-use-before-define
   if (!isString(input)) {
     return false;
   }
diff --git a/packages/api/package.json b/packages/api/package.json
index a96b8469..a0f3a20e 100644
--- a/packages/api/package.json
+++ b/packages/api/package.json
@@ -18,6 +18,7 @@
   },
   "scripts": {
     "prebuild": "rimraf lib",
+    "typecheck": "tsc --noEmit",
     "build": "tsc",
     "test": "cross-env NODE_ENV=test mocha -r ts-node/register 'src/*.spec.js' 'src/**/*.spec.js'"
   },
diff --git a/packages/api/src/format/input.ts b/packages/api/src/format/input.ts
index d0e1d5c3..1132f69d 100644
--- a/packages/api/src/format/input.ts
+++ b/packages/api/src/format/input.ts
@@ -3,6 +3,8 @@
 //
 // SPDX-License-Identifier: MIT
 
+/* eslint-disable @typescript-eslint/no-use-before-define */
+
 import BigNumber from 'bignumber.js';
 
 import {
@@ -90,7 +92,7 @@ export const inTopics = (topics?: (Topic | Topic[])[]): (string | null)[] => {
 
 export const inFilter = (options: FilterOptions) => {
   const result: {
-    [key in keyof FilterOptions]: number | string | string[] | Topic[]
+    [key in keyof FilterOptions]: number | string | string[] | Topic[];
   } = {};
 
   if (options) {
@@ -232,7 +234,7 @@ export const inTraceFilter = (filterObject: FilterObject) => {
 
         default:
           // @ts-ignore Here, we explicitly pass down extra keys, if they exist
-          result[key] = options[key];
+          result[key] = filterObject[key];
       }
     });
   }
diff --git a/packages/api/src/format/output.ts b/packages/api/src/format/output.ts
index 13c4cc58..73064b81 100644
--- a/packages/api/src/format/output.ts
+++ b/packages/api/src/format/output.ts
@@ -3,6 +3,8 @@
 //
 // SPDX-License-Identifier: MIT
 
+/* eslint-disable @typescript-eslint/no-use-before-define */
+
 import BigNumber from 'bignumber.js';
 import { isString } from '@parity/abi/lib/util/types';
 import { toChecksumAddress } from '@parity/abi/lib/util/address';
@@ -343,10 +345,12 @@ export function outSignerRequest (request: SerializedSignerRequest) {
           break;
 
         case 'origin':
+          /* eslint-disable no-case-declarations */
           // @ts-ignore "Object is possibly 'undefined'." No it's not.
           const type = Object.keys(result[key])[0];
           // @ts-ignore "Object is possibly 'undefined'." No it's not.
           const details = result[key][type];
+          /* eslint-enable no-case-declarations */
 
           request[key] = { type, details };
           break;
diff --git a/packages/api/src/util/encode.ts b/packages/api/src/util/encode.ts
index 879bfb12..75c5ba62 100644
--- a/packages/api/src/util/encode.ts
+++ b/packages/api/src/util/encode.ts
@@ -70,6 +70,7 @@ export const abiUnencode = (abi: AbiObject, data: string) => {
     return (
       field.type === 'function' &&
       !!field.inputs &&
+      // eslint-disable-next-line @typescript-eslint/no-use-before-define
       abiSignature(field.name, field.inputs.map(input => input.type)).substr(
         2,
         8
@@ -93,9 +94,7 @@ export const abiUnencode = (abi: AbiObject, data: string) => {
     (result, field, index) => {
       if (!field.name) {
         throw new Error(
-          `abiUnencode: input at index ${index} with type ${
-            field.type
-          } doesn't have a name.`
+          `abiUnencode: input at index ${index} with type ${field.type} doesn't have a name.`
         );
       }
       result[field.name] = argsByIndex[index];
diff --git a/packages/api/src/util/format.ts b/packages/api/src/util/format.ts
index 3d24198b..08904fd4 100644
--- a/packages/api/src/util/format.ts
+++ b/packages/api/src/util/format.ts
@@ -61,6 +61,7 @@ export const cleanupValue = (value: string | number | Bytes, type: string) => {
  * @param hex - The hex string to convert.
  */
 export const hexToBytes = (hex: string) => {
+  // eslint-disable-next-line @typescript-eslint/no-use-before-define
   const raw = toHex(hex).slice(2);
   const bytes = [];
 
@@ -114,6 +115,7 @@ export const asciiToHex = (baseString: string) => {
  */
 export const padRight = (input: string, length: number) => {
   const hexLength = length * 2;
+  // eslint-disable-next-line @typescript-eslint/no-use-before-define
   const value = toHex(input).substr(2, hexLength);
 
   return (
@@ -133,6 +135,7 @@ export const padRight = (input: string, length: number) => {
  */
 export const padLeft = (input: string | undefined, length: number) => {
   const hexLength = length * 2;
+  // eslint-disable-next-line @typescript-eslint/no-use-before-define
   const value = toHex(input).substr(2, hexLength);
 
   return (
diff --git a/packages/api/src/util/types.spec.ts b/packages/api/src/util/types.spec.ts
index 2dba528b..7e4ed54a 100644
--- a/packages/api/src/util/types.spec.ts
+++ b/packages/api/src/util/types.spec.ts
@@ -12,7 +12,7 @@ import {
   isObject,
   isString
 } from './types';
-const Eth = require('../rpc/eth');
+import * as Eth from '../rpc/eth';
 
 describe('util/types', () => {
   describe('isArray', () => {
@@ -71,6 +71,7 @@ describe('util/types', () => {
 
   describe('isInstanceOf', () => {
     it('correctly identifies build-in instanceof', () => {
+      // eslint-disable-next-line no-new-wrappers
       expect(isInstanceOf(new String('123'), String)).toBe(true);
     });
 
diff --git a/packages/contracts/package.json b/packages/contracts/package.json
index 024dbd39..90498fef 100644
--- a/packages/contracts/package.json
+++ b/packages/contracts/package.json
@@ -18,6 +18,7 @@
   "scripts": {
     "docs": "typedoc && rimraf docs/README.md",
     "prebuild": "rimraf lib",
+    "typecheck": "tsc --noEmit",
     "build": "tsc",
     "test": "jest"
   },
diff --git a/packages/contracts/src/badgereg.ts b/packages/contracts/src/badgereg.ts
index 85b4af50..4e3d011b 100644
--- a/packages/contracts/src/badgereg.ts
+++ b/packages/contracts/src/badgereg.ts
@@ -1,4 +1,4 @@
-// Copyright 2015-2019 Parity Technologies (UK) Ltd.
+// Copyright 2015-2019 Parity Technologies(UK) Ltd.
 // This file is part of Parity.
 //
 // SPDX-License-Identifier: MIT
@@ -28,6 +28,7 @@ export default class BadgeReg {
   public contracts: {
     [key: string]: Contract;
   } = {};
+
   private _registry: Registry;
 
   constructor (api: Api, registry: Registry) {
diff --git a/packages/contracts/src/registry.ts b/packages/contracts/src/registry.ts
index 1635761e..14ce410f 100644
--- a/packages/contracts/src/registry.ts
+++ b/packages/contracts/src/registry.ts
@@ -7,7 +7,7 @@ import * as abis from './abi';
 import { Api, Contract, ContractInstance } from './types';
 
 interface QueueItem {
-  resolve (...args: any[]): void;
+  resolve(...args: any[]): void;
 }
 
 const REGISTRY_V1_HASHES = [
@@ -20,11 +20,13 @@ export default class Registry {
   private _contracts: {
     [key: string]: Contract;
   } = {};
+
   private _fetching = false;
   private _instance: ContractInstance = null;
   private _pendingContracts: {
     [key: string]: Promise<Contract>;
   } = {};
+
   private _queue: QueueItem[] = [];
   private _registryContract: Contract | null = null;
 
diff --git a/packages/electron/package.json b/packages/electron/package.json
index c8a87bd6..06f99b4e 100644
--- a/packages/electron/package.json
+++ b/packages/electron/package.json
@@ -17,6 +17,7 @@
   "scripts": {
     "docs": "typedoc",
     "prebuild": "rimraf lib",
+    "typecheck": "tsc --noEmit",
     "build": "tsc",
     "test": "jest"
   },
diff --git a/packages/electron/src/getParityPath.ts b/packages/electron/src/getParityPath.ts
index 63b11291..3a2b637c 100644
--- a/packages/electron/src/getParityPath.ts
+++ b/packages/electron/src/getParityPath.ts
@@ -115,7 +115,7 @@ export async function getParityPath () {
     );
     return path;
   } catch (err) {
-    logger()('@parity/electron:main')(`Parity not found on machine.`);
+    logger()('@parity/electron:main')('Parity not found on machine.');
     throw err;
   }
 }
diff --git a/packages/electron/src/isParityRunning.ts b/packages/electron/src/isParityRunning.ts
index 7f6bb606..b3fc49f4 100644
--- a/packages/electron/src/isParityRunning.ts
+++ b/packages/electron/src/isParityRunning.ts
@@ -24,7 +24,7 @@ export async function isParityRunning (
     wsPort: '8546'
   }
 ) {
-  return new Promise((resolve, reject) => {
+  return new Promise(resolve => {
     const { wsInterface, wsPort } = {
       wsInterface: '127.0.0.1',
       wsPort: '8546',
diff --git a/packages/electron/src/runParity.ts b/packages/electron/src/runParity.ts
index ddb437e9..7b793f64 100644
--- a/packages/electron/src/runParity.ts
+++ b/packages/electron/src/runParity.ts
@@ -57,7 +57,7 @@ export async function runParity (
     },
     ...options
   };
-  const parityPath = options.parityPath || await getParityPath();
+  const parityPath = options.parityPath || (await getParityPath());
 
   // Some users somehow had no +x on the parity binary after downloading
   // it. We try to set it here (no guarantee it will work, we might not
@@ -68,7 +68,7 @@ export async function runParity (
     /* Do nothing if error. */
   }
 
-  return new Promise((resolve, reject) => {
+  return new Promise(resolve => {
     let logLastLine = ''; // Always contains last line of the Parity logs
 
     // Run an instance of parity with the correct flags
diff --git a/packages/electron/src/signerNewToken.ts b/packages/electron/src/signerNewToken.ts
index ad462768..1446c796 100644
--- a/packages/electron/src/signerNewToken.ts
+++ b/packages/electron/src/signerNewToken.ts
@@ -13,11 +13,15 @@ import logger from './utils/logger';
  * Runs parity signer new-token and resolves with a new secure token to be
  * used in a dapp. Rejects if no token could be extracted.
  */
-export function signerNewToken (options?: { parityPath: string; }): Promise<string> {
+export function signerNewToken (options?: {
+  parityPath: string;
+}): Promise<string> {
+  // eslint-disable-next-line no-async-promise-executor
   return new Promise(async (resolve, reject) => {
     logger()('@parity/electron:main')('Requesting new token.');
 
-    const parityPath = options && options.parityPath || await getParityPath();
+    const parityPath =
+      (options && options.parityPath) || (await getParityPath());
 
     // Generate a new token
     const paritySigner = spawn(parityPath, ['signer', 'new-token']);
diff --git a/packages/light.js-react/package.json b/packages/light.js-react/package.json
index 2c6336ec..7d49b8de 100644
--- a/packages/light.js-react/package.json
+++ b/packages/light.js-react/package.json
@@ -22,6 +22,7 @@
   },
   "scripts": {
     "prebuild": "rimraf lib",
+    "typecheck": "tsc --noEmit",
     "build": "tsc",
     "test": "jest"
   },
diff --git a/packages/light.js-react/src/index.spec.tsx b/packages/light.js-react/src/index.spec.tsx
index 3ea93e2f..667483fd 100644
--- a/packages/light.js-react/src/index.spec.tsx
+++ b/packages/light.js-react/src/index.spec.tsx
@@ -5,6 +5,7 @@
 
 import 'symbol-observable'; // TODO Remove this once https://github.com/acdlite/recompose/pull/660 is merged
 
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
 import * as React from 'react';
 import * as Adapter from 'enzyme-adapter-react-16';
 import * as Enzyme from 'enzyme';
@@ -16,7 +17,9 @@ import light, { withOneObservable } from './';
 Enzyme.configure({ adapter: new Adapter() });
 const { mount } = Enzyme;
 
-const MockComponent = toClass(props => <div>{JSON.stringify(props)}</div>) as any;
+const MockComponent = toClass(props => (
+  <div>{JSON.stringify(props)}</div>
+)) as any;
 const mockRpc$ = () => of('bar');
 
 describe('withOneObservable', () => {
@@ -25,6 +28,7 @@ describe('withOneObservable', () => {
   });
 
   test('it should give the wrapped component the correct props', () => {
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
     const EnhancedComponent = withOneObservable('foo', mockRpc$)(MockComponent);
     const wrapper = mount(<EnhancedComponent />);
     const div = wrapper.find('div');
@@ -42,6 +46,7 @@ describe('light', () => {
   });
 
   test('it should give the wrapped component the correct props', () => {
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
     const EnhancedComponent = light({ foo: mockRpc$, baz: mockRpc$ })(
       MockComponent
     );
diff --git a/packages/light.js-react/src/index.ts b/packages/light.js-react/src/index.ts
index a683a7b5..041411ff 100644
--- a/packages/light.js-react/src/index.ts
+++ b/packages/light.js-react/src/index.ts
@@ -24,16 +24,16 @@ export const withOneObservable = <OwnProps, T>(
   key: string,
   rpc$: RpcObservable<any, T>
 ) =>
-  mapPropsStreamWithConfig({
+    mapPropsStreamWithConfig({
     // Converts a plain ES observable to an RxJS 6 observable
-    fromESObservable: from,
-    toESObservable: stream$ => stream$
-  })(props$ =>
-    combineLatest(
-      props$,
-      (props$ as Observable<OwnProps>).pipe(switchMap(rpc$))
-    ).pipe(map(([props, value]) => ({ ...props, [key]: value })))
-  );
+      fromESObservable: from,
+      toESObservable: stream$ => stream$
+    })(props$ =>
+      combineLatest(
+        props$,
+        (props$ as Observable<OwnProps>).pipe(switchMap(rpc$))
+      ).pipe(map(([props, value]) => ({ ...props, [key]: value })))
+    );
 
 /**
  * HOC which listens to multiple Observables, and injects those emitted values
diff --git a/packages/light.js/package.json b/packages/light.js/package.json
index 540058f1..1f0d8612 100644
--- a/packages/light.js/package.json
+++ b/packages/light.js/package.json
@@ -22,6 +22,7 @@
   "scripts": {
     "docs": "typedoc",
     "prebuild": "rimraf lib",
+    "typecheck": "tsc --noEmit",
     "build": "tsc",
     "test": "jest --runInBand"
   },
diff --git a/packages/light.js/src/frequency/frequency.spec.ts b/packages/light.js/src/frequency/frequency.spec.ts
index 30a3e234..87472430 100644
--- a/packages/light.js/src/frequency/frequency.spec.ts
+++ b/packages/light.js/src/frequency/frequency.spec.ts
@@ -9,11 +9,7 @@ import { take } from 'rxjs/operators';
 import frequency from './frequency';
 import { FrequencyObservable, FrequencyKey, FrequencyMap } from '../types';
 import isObservable from '../utils/isObservable';
-import {
-  MockProvider,
-  rejectApi,
-  resolveApi
-} from '../utils/testHelpers/mockApi';
+import { resolveApi } from '../utils/testHelpers/mockApi';
 import { setApi } from '@parity/light.js/src/api';
 
 jest.mock('@parity/api');
diff --git a/packages/light.js/src/frequency/other.ts b/packages/light.js/src/frequency/other.ts
index a4529a0e..999b7521 100644
--- a/packages/light.js/src/frequency/other.ts
+++ b/packages/light.js/src/frequency/other.ts
@@ -3,6 +3,8 @@
 //
 // SPDX-License-Identifier: MIT
 
+/* eslint-disable @typescript-eslint/no-unused-vars */
+
 import { of } from 'rxjs';
 import * as memoizee from 'memoizee';
 
@@ -17,6 +19,7 @@ function onStartup$ (options?: FrequencyObservableOptions) {
   return of(0);
 }
 // @ts-ignore
+// eslint-disable-next-line no-func-assign
 onStartup$ = memoizee(onStartup$);
 
 export { onStartup$ };
diff --git a/packages/light.js/src/frequency/time.ts b/packages/light.js/src/frequency/time.ts
index e5a540ab..7c137735 100644
--- a/packages/light.js/src/frequency/time.ts
+++ b/packages/light.js/src/frequency/time.ts
@@ -3,6 +3,8 @@
 //
 // SPDX-License-Identifier: MIT
 
+/* eslint-disable @typescript-eslint/no-unused-vars */
+
 import { timer } from 'rxjs';
 import * as memoizee from 'memoizee';
 
@@ -15,6 +17,7 @@ function onEverySecond$ (options?: FrequencyObservableOptions) {
   return timer(0, 1000);
 }
 // @ts-ignore
+// eslint-disable-next-line no-func-assign
 onEverySecond$ = memoizee(onEverySecond$);
 
 /**
@@ -24,6 +27,7 @@ function onEvery2Seconds$ (options?: FrequencyObservableOptions) {
   return timer(0, 2000);
 }
 // @ts-ignore
+// eslint-disable-next-line no-func-assign
 onEvery2Seconds$ = memoizee(onEvery2Seconds$);
 
 /**
@@ -33,6 +37,7 @@ function onEvery5Seconds$ (options?: FrequencyObservableOptions) {
   return timer(0, 5000);
 }
 // @ts-ignore
+// eslint-disable-next-line no-func-assign
 onEvery5Seconds$ = memoizee(onEvery5Seconds$);
 
 export { onEverySecond$, onEvery2Seconds$, onEvery5Seconds$ };
diff --git a/packages/light.js/src/frequency/utils/createPubsubObservable.spec.ts b/packages/light.js/src/frequency/utils/createPubsubObservable.spec.ts
index 3a4eb076..ad23e2cd 100644
--- a/packages/light.js/src/frequency/utils/createPubsubObservable.spec.ts
+++ b/packages/light.js/src/frequency/utils/createPubsubObservable.spec.ts
@@ -3,7 +3,10 @@
 //
 // SPDX-License-Identifier: MIT
 
-import createPubsubObservable, { POLL_INTERVAL, UNSUB_DELAY } from './createPubsubObservable';
+import createPubsubObservable, {
+  POLL_INTERVAL,
+  UNSUB_DELAY
+} from './createPubsubObservable';
 import isObservable from '../../utils/isObservable';
 import { rejectApi, resolveApi } from '../../utils/testHelpers/mockApi';
 import { setApi } from '../../api';
@@ -90,14 +93,20 @@ describe('should manage polling sparingly', () => {
   });
 
   it('should emit values and re-emit previous value on observable subscription', async () => {
-    setApi(resolveApi(() => {
-      return called++;
-    }, false));
-
-    sub1 = initial$.subscribe(i => { sub1received.push(i as number); });
+    setApi(
+      resolveApi(() => {
+        return called++;
+      }, false)
+    );
+
+    sub1 = initial$.subscribe(i => {
+      sub1received.push(i as number);
+    });
 
     await sleep(POLL_INTERVAL - 5);
-    sub2 = copy$.subscribe(i => { sub2Received.push(i as number); });
+    sub2 = copy$.subscribe(i => {
+      sub2Received.push(i as number);
+    });
 
     await sleep(10);
     expect(sub1received).toEqual([0, 1]);
@@ -109,7 +118,7 @@ describe('should manage polling sparingly', () => {
     sub2.unsubscribe();
 
     await sleep(UNSUB_DELAY);
-    let previousCalled = called;
+    const previousCalled = called;
 
     await sleep(POLL_INTERVAL + 5);
     expect(called).toBe(previousCalled);
@@ -120,16 +129,16 @@ describe('should manage pubsub connection sparingly', () => {
   let blockNumber = 10442873;
   const api = {
     isPubSub: true,
-    pubsub:
-    {
+    pubsub: {
       eth: {
         blockNumber: async (next: any) => {
+          // eslint-disable-next-line @typescript-eslint/no-use-before-define
           expect(subscription).not.toBeUndefined();
           next(null, blockNumber++);
           return 5;
         }
       },
-      unsubscribe: (_subscriptionId: any) => { return; }
+      unsubscribe: (_subscriptionId: any) => {}
     }
   };
   const pubsubUnsubSpy = jest.spyOn(api.pubsub, 'unsubscribe');
@@ -158,7 +167,7 @@ describe('should manage pubsub connection sparingly', () => {
   });
 
   it('should re-emit previous value on observable subscription', async () => {
-    let values: number[] = [];
+    const values: number[] = [];
     subscription = obs.subscribe(x => values.push(x));
 
     await sleep(5);
@@ -166,9 +175,12 @@ describe('should manage pubsub connection sparingly', () => {
   });
 
   it('should re-use the same pubsub when used twice', async () => {
-    const obs2: Observable<number> = createPubsubObservable('eth_blockNumber', 'eth_blockNumber');
+    const obs2: Observable<number> = createPubsubObservable(
+      'eth_blockNumber',
+      'eth_blockNumber'
+    );
 
-    let values: number[] = [];
+    const values: number[] = [];
     obs2.subscribe(x => values.push(x));
     expect(values).toEqual([10442874]);
   });
diff --git a/packages/light.js/src/frequency/utils/createPubsubObservable.ts b/packages/light.js/src/frequency/utils/createPubsubObservable.ts
index 14395c01..597e9b4c 100644
--- a/packages/light.js/src/frequency/utils/createPubsubObservable.ts
+++ b/packages/light.js/src/frequency/utils/createPubsubObservable.ts
@@ -57,7 +57,7 @@ const createPubsubObservableWithApi = memoizee(
     if (!api.isPubSub) {
       debug('@parity/light.js:api')(
         `Pubsub not available for ${
-        api.provider ? api.provider.constructor.name : 'current Api'
+          api.provider ? api.provider.constructor.name : 'current Api'
         } provider, polling "${fallback}" every ${POLL_INTERVAL}ms.`
       );
 
@@ -96,7 +96,9 @@ const createPubsubObservableWithApi = memoizee(
       });
     }
 
-    return observable.pipe(distinctReplayRefCountDelay(UNSUB_DELAY)) as Observable<T>;
+    return observable.pipe(
+      distinctReplayRefCountDelay(UNSUB_DELAY)
+    ) as Observable<T>;
   }
 );
 
diff --git a/packages/light.js/src/rpc/eth.ts b/packages/light.js/src/rpc/eth.ts
index 75767b02..0eb6563f 100644
--- a/packages/light.js/src/rpc/eth.ts
+++ b/packages/light.js/src/rpc/eth.ts
@@ -19,7 +19,7 @@ import { switchMapPromise } from '../utils/operators';
  * @return - An Observable containing the chain ID.
  */
 export function chainId$ (options?: RpcObservableOptions) {
-  return createRpc$<any, BigNumber | Symbol>({
+  return createRpc$<any, BigNumber | symbol>({
     calls: ['eth_chainId'],
     frequency: [frequency.onStartup$],
     name: 'chainId$',
@@ -51,7 +51,7 @@ export function accounts$ (options?: RpcObservableOptions) {
  * @return - An Observable containing the balance.
  */
 export function balanceOf$ (address: Address, options?: RpcObservableOptions) {
-  return createRpc$<any, BigNumber | Symbol>({
+  return createRpc$<any, BigNumber | symbol>({
     calls: ['eth_getBalance'],
     frequency: [frequency.onEveryBlock$, frequency.onStartup$],
     name: 'balanceOf$',
@@ -66,12 +66,17 @@ export function balanceOf$ (address: Address, options?: RpcObservableOptions) {
  * @param options - Options to pass to {@link RpcObservableOptions}.
  * @return - An Observable containing the transaction count.
  */
-export function transactionCountOf$ (address: Address, options?: RpcObservableOptions) {
-  return createRpc$<any, BigNumber | Symbol>({
+export function transactionCountOf$ (
+  address: Address,
+  options?: RpcObservableOptions
+) {
+  return createRpc$<any, BigNumber | symbol>({
     calls: ['eth_getTransactionCount'],
     frequency: [frequency.onEveryBlock$, frequency.onStartup$],
     name: 'transactionCountOf$',
-    pipes: api => [switchMapPromise(() => api.eth.getTransactionCount(address))]
+    pipes: api => [
+      switchMapPromise(() => api.eth.getTransactionCount(address))
+    ]
   })(options)(address);
 }
 
@@ -107,15 +112,11 @@ export function blockNumber$ (options?: RpcObservableOptions) {
  * Shorthand for fetching the current account's balance.
  */
 export function myBalance$ (options?: RpcObservableOptions) {
-  return createRpc$<Address, BigNumber | Symbol>({
-    calls: [`eth_getBalance`],
+  return createRpc$<Address, BigNumber | symbol>({
+    calls: ['eth_getBalance'],
     dependsOn: defaultAccount$,
     name: 'myBalance$',
-    pipes: () => [
-      switchMap(defaultAccount =>
-        balanceOf$(defaultAccount)
-      )
-    ]
+    pipes: () => [switchMap(defaultAccount => balanceOf$(defaultAccount))]
   })(options)();
 }
 
diff --git a/packages/light.js/src/rpc/other/makeContract.ts b/packages/light.js/src/rpc/other/makeContract.ts
index 55bf8bdd..42370610 100644
--- a/packages/light.js/src/rpc/other/makeContract.ts
+++ b/packages/light.js/src/rpc/other/makeContract.ts
@@ -91,15 +91,18 @@ const makeContractWithApi = memoizee(
         } else {
           const { estimate, passphrase, ...txFields } = options;
 
-          return post$({
-            to: address,
-            data: abiEncode(
-              method.name,
-              method.inputs.map(({ kind: { type } }: any) => type), // TODO Use @parity/api types
-              args
-            ),
-            ...txFields
-          }, { estimate, passphrase });
+          return post$(
+            {
+              to: address,
+              data: abiEncode(
+                method.name,
+                method.inputs.map(({ kind: { type } }: any) => type), // TODO Use @parity/api types
+                args
+              ),
+              ...txFields
+            },
+            { estimate, passphrase }
+          );
         }
       };
     });
diff --git a/packages/light.js/src/rpc/other/post.ts b/packages/light.js/src/rpc/other/post.ts
index bf7b34e2..270944c8 100644
--- a/packages/light.js/src/rpc/other/post.ts
+++ b/packages/light.js/src/rpc/other/post.ts
@@ -8,12 +8,11 @@ import * as debug from 'debug';
 import { Observable, Observer } from 'rxjs';
 
 import { createApiFromProvider, getApi } from '../../api';
-import { distinctReplayRefCountDelay } from '../../utils/operators';
 import { RpcObservableOptions, Tx, TxStatus } from '../../types';
 
 interface PostOptions extends RpcObservableOptions {
   estimate?: boolean;
-  passphrase: String;
+  passphrase: string;
 }
 
 function getTransactionByHash (transactionHash: string, api: any) {
@@ -64,10 +63,13 @@ export function post$ (tx: Tx, options: PostOptions) {
         observer.next({ estimated: gas });
       }
 
-      const signedTransaction = await api.personal.signTransaction(tx, passphrase);
+      const signedTransaction = await api.personal.signTransaction(
+        tx,
+        passphrase
+      );
       observer.next({ signed: signedTransaction.raw });
+      // eslint-disable-next-line @typescript-eslint/no-use-before-define
       postRaw$(signedTransaction.raw).subscribe(observer);
-
     } catch (error) {
       observer.next({ failed: error });
       observer.error(error);
diff --git a/packages/light.js/src/rpc/parity.ts b/packages/light.js/src/rpc/parity.ts
index 456ece2d..24139aee 100644
--- a/packages/light.js/src/rpc/parity.ts
+++ b/packages/light.js/src/rpc/parity.ts
@@ -48,6 +48,8 @@ export function versionInfo$ (options?: RpcObservableOptions) {
     calls: ['parity_versionInfo'],
     frequency: [frequency.onStartup$],
     name: 'versionInfo$',
-    pipes: api => [switchMapPromise(() => api.parity.versionInfo(), { emitErrors: true })]
+    pipes: api => [
+      switchMapPromise(() => api.parity.versionInfo(), { emitErrors: true })
+    ]
   })(options)();
 }
diff --git a/packages/light.js/src/rpc/rpc.spec.ts b/packages/light.js/src/rpc/rpc.spec.ts
index 48af663c..b1a6c194 100644
--- a/packages/light.js/src/rpc/rpc.spec.ts
+++ b/packages/light.js/src/rpc/rpc.spec.ts
@@ -6,9 +6,7 @@
 import * as Api from '@parity/api';
 
 import isObservable from '../utils/isObservable';
-import {
-  resolveApi
-} from '../utils/testHelpers/mockApi';
+import { resolveApi } from '../utils/testHelpers/mockApi';
 import rpc from './rpc';
 import { RpcKey, RpcMap, RpcObservable } from '../types';
 import { setApi } from '../api';
@@ -63,7 +61,6 @@ const testRpc = (name: string, rpc$: RpcObservable<any, any>) =>
 
     // Memoization tests don't concern post$
     if (name === 'post$' || name === 'postRaw$') {
-      return;
     }
   });
 
diff --git a/packages/light.js/src/rpc/utils/createRpc.spec.ts b/packages/light.js/src/rpc/utils/createRpc.spec.ts
index 70feeeb9..1e36f6de 100644
--- a/packages/light.js/src/rpc/utils/createRpc.spec.ts
+++ b/packages/light.js/src/rpc/utils/createRpc.spec.ts
@@ -11,26 +11,27 @@ import { setApi } from '../../api';
 import sleep from '../../utils/testHelpers/sleep';
 
 describe('should manage source observable sparingly', () => {
-
   let unsubscribe = 0;
 
   // Returns an observable
   function rpc (options?: RpcObservableOptions) {
     return createRpc$<any, number>({
-      frequency: [() => {
-        return new Observable(subscriber => {
-          let i = 0;
-          subscriber.next(i++);
-          const itl = setInterval(() => {
+      frequency: [
+        () => {
+          return new Observable(subscriber => {
+            let i = 0;
             subscriber.next(i++);
-          }, 1000);
-          return () => {
-            clearInterval(itl);
-            unsubscribe++;
-          };
-        });
-      }],
-      pipes: api => []
+            const itl = setInterval(() => {
+              subscriber.next(i++);
+            }, 1000);
+            return () => {
+              clearInterval(itl);
+              unsubscribe++;
+            };
+          });
+        }
+      ],
+      pipes: () => []
     })(options)();
   }
 
@@ -62,7 +63,7 @@ describe('should manage source observable sparingly', () => {
   });
 
   it('should re-emit previous value on observable subscription', async () => {
-    let values: number[] = [];
+    const values: number[] = [];
     subscription = obs.subscribe(x => {
       values.push(x);
     });
@@ -74,7 +75,7 @@ describe('should manage source observable sparingly', () => {
   it('should use the same source observable when used twice', async () => {
     const obs2: Observable<number> = rpc();
 
-    let values: number[] = [];
+    const values: number[] = [];
 
     await sleep(1000);
 
@@ -86,7 +87,7 @@ describe('should manage source observable sparingly', () => {
     setApi(resolveApi('foo'));
     const obs2: Observable<number> = rpc();
 
-    let values: number[] = [];
+    const values: number[] = [];
     obs2.subscribe(x => values.push(x));
 
     await sleep(5);
@@ -94,11 +95,11 @@ describe('should manage source observable sparingly', () => {
   });
 
   let obs3: Observable<number>;
-  let provider = new MockProvider();
+  const provider = new MockProvider();
   it('should not use the same source observable if options are passed', async () => {
     obs3 = rpc({ provider });
 
-    let values: number[] = [];
+    const values: number[] = [];
     obs3.subscribe(x => values.push(x));
 
     await sleep(5);
@@ -109,7 +110,7 @@ describe('should manage source observable sparingly', () => {
     const obs4: Observable<number> = rpc({ provider });
 
     await sleep(1000);
-    let values: number[] = [];
+    const values: number[] = [];
     obs4.subscribe(x => values.push(x));
 
     expect(values).toEqual([1]);
diff --git a/packages/light.js/src/rpc/utils/createRpc.ts b/packages/light.js/src/rpc/utils/createRpc.ts
index 3f0654aa..e5a0c0ae 100644
--- a/packages/light.js/src/rpc/utils/createRpc.ts
+++ b/packages/light.js/src/rpc/utils/createRpc.ts
@@ -3,7 +3,7 @@
 //
 // SPDX-License-Identifier: MIT
 
-import { defer, merge, Observable, of, OperatorFunction } from 'rxjs';
+import { defer, merge, Observable, OperatorFunction } from 'rxjs';
 import { isFunction } from '@parity/api/lib/util/types';
 // @ts-ignore Unfortunately no types for memoizee/weak.
 import * as memoizeeWeak from 'memoizee/weak';
@@ -34,9 +34,7 @@ const createRpcWithApi = memoizeeWeak(
   <Source, Out>(api: any, metadata: Metadata<Source, Out>, ...args: any[]) => {
     if (!metadata.dependsOn && !metadata.frequency) {
       throw new Error(
-        `Rpc$ '${
-          metadata.name
-        }' needs either a 'dependsOn' or a 'frequency' field.`
+        `Rpc$ '${metadata.name}' needs either a 'dependsOn' or a 'frequency' field.`
       );
     }
 
@@ -46,10 +44,10 @@ const createRpcWithApi = memoizeeWeak(
     const source$ = metadata.dependsOn
       ? metadata.dependsOn(...args, { provider: api.provider })
       : merge(
-          ...(metadata.frequency as FrequencyObservable<Source>[]).map(f =>
-            f({ provider: api.provider })
-          )
-        );
+        ...(metadata.frequency as FrequencyObservable<Source>[]).map(f =>
+          f({ provider: api.provider })
+        )
+      );
 
     // The pipes to add
     const pipes: OperatorFunction<any, any>[] = [];
@@ -84,7 +82,7 @@ const createRpcWithApi = memoizeeWeak(
  * createRpc(metadata)(options) returns a RpcObservable.
  * createRpc(metadata)(options)(someArgs) returns an Observable.
  */
-const createRpc = <Source, Out> (metadata: Metadata<Source, Out>) => (
+const createRpc = <Source, Out>(metadata: Metadata<Source, Out>) => (
   options: RpcObservableOptions = {}
 ) => (...args: any[]) => {
   // Evaluate api only once we subscribe
diff --git a/packages/light.js/src/types.ts b/packages/light.js/src/types.ts
index 7870408a..8c3c43e6 100644
--- a/packages/light.js/src/types.ts
+++ b/packages/light.js/src/types.ts
@@ -17,7 +17,7 @@ declare global {
 
 // TODO This should be on @parity/api
 export type AccountsInfo = {
-  name: String;
+  name: string;
 };
 
 // TODO This should be on @parity/api
@@ -53,7 +53,7 @@ export interface FrequencyObservable<T> {
 }
 
 export type FrequencyMap = {
-  [index in FrequencyKey]: FrequencyObservable<any>
+  [index in FrequencyKey]: FrequencyObservable<any>;
 };
 
 export interface MakeContract {
@@ -68,7 +68,7 @@ export type RpcKey = keyof typeof rpc;
 export interface RpcObservable<Source, Out> {
   (...args: any[]): Observable<Out>;
   metadata?: Metadata<Source, Out>;
-  setFrequency? (frequency: FrequencyObservable<Source>[]): void; // post$, makeContract... don't have setFrequency
+  setFrequency?(frequency: FrequencyObservable<Source>[]): void; // post$, makeContract... don't have setFrequency
 }
 
 export type RpcMap = { [index in RpcKey]: RpcObservable<any, any> };
diff --git a/packages/light.js/src/utils/operators/distinctReplayRefCountDelay.spec.ts b/packages/light.js/src/utils/operators/distinctReplayRefCountDelay.spec.ts
index 0a68f949..d9d26875 100644
--- a/packages/light.js/src/utils/operators/distinctReplayRefCountDelay.spec.ts
+++ b/packages/light.js/src/utils/operators/distinctReplayRefCountDelay.spec.ts
@@ -6,8 +6,9 @@
 import { distinctReplayRefCountDelay } from './distinctReplayRefCountDelay';
 import isObservable from '../isObservable';
 import mockRpc$ from '../testHelpers/mockRpc';
-import { Observable } from 'rxjs';
 
 it('should return an Observable', () => {
-  expect(isObservable(mockRpc$().pipe(distinctReplayRefCountDelay(2000)))).toBe(true);
+  expect(isObservable(mockRpc$().pipe(distinctReplayRefCountDelay(2000)))).toBe(
+    true
+  );
 });
diff --git a/packages/light.js/src/utils/operators/distinctReplayRefCountDelay.ts b/packages/light.js/src/utils/operators/distinctReplayRefCountDelay.ts
index 27822822..90283b1d 100644
--- a/packages/light.js/src/utils/operators/distinctReplayRefCountDelay.ts
+++ b/packages/light.js/src/utils/operators/distinctReplayRefCountDelay.ts
@@ -3,7 +3,7 @@
 //
 // SPDX-License-Identifier: MIT
 
-import { publishReplay, refCount } from 'rxjs/operators';
+import { publishReplay } from 'rxjs/operators';
 import { Observable } from 'rxjs';
 import { operators } from 'rxjs-etc';
 
@@ -19,13 +19,13 @@ const { refCountDelay } = operators;
 export const distinctReplayRefCountDelay = (delay: number) => <T>(
   source$: Observable<T>
 ): Observable<T> =>
-  source$.pipe(
-    distinctValues(),
+    source$.pipe(
+      distinctValues(),
 
-    // Note: uses a single subject, so the previous value might come from a
-    // previous dropped subscription to the source observable
-    publishReplay(1),
+      // Note: uses a single subject, so the previous value might come from a
+      // previous dropped subscription to the source observable
+      publishReplay(1),
 
-    // Unsubscribe to the source observable only after 2 seconds with no subscribers
-    refCountDelay(delay)
-  );
+      // Unsubscribe to the source observable only after 2 seconds with no subscribers
+      refCountDelay(delay)
+    );
diff --git a/packages/light.js/src/utils/operators/switchMapPromise.spec.ts b/packages/light.js/src/utils/operators/switchMapPromise.spec.ts
index 220e4cad..444637dd 100644
--- a/packages/light.js/src/utils/operators/switchMapPromise.spec.ts
+++ b/packages/light.js/src/utils/operators/switchMapPromise.spec.ts
@@ -3,8 +3,6 @@
 //
 // SPDX-License-Identifier: MIT
 
-import { skip, take } from 'rxjs/operators';
-
 import mockRpc$ from '../testHelpers/mockRpc';
 import { rejectApi, resolveApi } from '../testHelpers/mockApi';
 import { switchMapPromise } from './switchMapPromise';
@@ -32,7 +30,9 @@ it('should not error when the promise rejects', done => {
 it('should fire an error when the promise resolves with an error', done => {
   mockRpc$()
     .pipe(
-      switchMapPromise(rejectApi(new Error('boo')).fake.method, { emitErrors: true })
+      switchMapPromise(rejectApi(new Error('boo')).fake.method, {
+        emitErrors: true
+      })
     )
     .subscribe(undefined, err => {
       expect(err).toEqual(new Error('boo'));
@@ -43,7 +43,9 @@ it('should fire an error when the promise resolves with an error', done => {
 it('should fire an error when the promise rejects', done => {
   mockRpc$()
     .pipe(
-      switchMapPromise(rejectApi(new Error('boo')).fake.method, { emitErrors: true })
+      switchMapPromise(rejectApi(new Error('boo')).fake.method, {
+        emitErrors: true
+      })
     )
     .subscribe(undefined, err => {
       expect(err).toEqual(new Error('boo'));
@@ -53,9 +55,7 @@ it('should fire an error when the promise rejects', done => {
 
 it('should fire the correct value when the promise resolves', done => {
   mockRpc$()
-    .pipe(
-      switchMapPromise(resolveApi().fake.method)
-    )
+    .pipe(switchMapPromise(resolveApi().fake.method))
     .subscribe(data => {
       expect(data).toBe('foo');
       done();
diff --git a/packages/light.js/src/utils/operators/switchMapPromise.ts b/packages/light.js/src/utils/operators/switchMapPromise.ts
index d2b3eb47..057b558b 100644
--- a/packages/light.js/src/utils/operators/switchMapPromise.ts
+++ b/packages/light.js/src/utils/operators/switchMapPromise.ts
@@ -4,7 +4,7 @@
 // SPDX-License-Identifier: MIT
 
 import { catchError, switchMap } from 'rxjs/operators';
-import { empty, from, Observable, throwError, OperatorFunction } from 'rxjs';
+import { empty, from, throwError, OperatorFunction } from 'rxjs';
 
 interface SwitchMapPromiseOptions {
   emitErrors: boolean;
@@ -20,11 +20,14 @@ interface SwitchMapPromiseOptions {
  *
  * @ignore
  */
-export const switchMapPromise = <T,U>(promise: () => Promise<U>, options: SwitchMapPromiseOptions = { emitErrors: false }): OperatorFunction<T, U> =>
+export const switchMapPromise = <T, U>(
+  promise: () => Promise<U>,
+  options: SwitchMapPromiseOptions = { emitErrors: false }
+): OperatorFunction<T, U> =>
     switchMap(() =>
       from(
         promise().then(result => {
-          // The result can sometimes be {id: 2, jsonrpc: "2.0", error: {...}}
+        // The result can sometimes be {id: 2, jsonrpc: "2.0", error: {...}}
           if ((result as any).error) {
             return Promise.reject(result);
           }
@@ -48,4 +51,4 @@ export const switchMapPromise = <T,U>(promise: () => Promise<U>, options: Switch
           }
         })
       )
-  );
+    );
diff --git a/packages/light.js/src/utils/testHelpers/mockApi.ts b/packages/light.js/src/utils/testHelpers/mockApi.ts
index ff4748f4..df1672bc 100644
--- a/packages/light.js/src/utils/testHelpers/mockApi.ts
+++ b/packages/light.js/src/utils/testHelpers/mockApi.ts
@@ -22,7 +22,15 @@ export class MockProvider extends EventEmitter {
 
 // List of JSONRPCs we want to mock
 const listOfMockRps: { [index: string]: string[] } = {
-  eth: ['accounts', 'blockNumber', 'chainId', 'getBalance', 'getTransactionCount', 'newHeads', 'syncing'],
+  eth: [
+    'accounts',
+    'blockNumber',
+    'chainId',
+    'getBalance',
+    'getTransactionCount',
+    'newHeads',
+    'syncing'
+  ],
   fake: ['method'],
   net: ['peerCount'],
   parity: ['accountsInfo', 'chain', 'postTransaction', 'versionInfo']
@@ -34,15 +42,21 @@ const listOfMockRps: { [index: string]: string[] } = {
  * @ignore
  */
 const createApi = (
-  resolveValueOrFunction: string | object | (() => any) | { error: string } | Error,
+  resolveValueOrFunction:
+    | string
+    | object
+    | (() => any)
+    | { error: string }
+    | Error,
   isPubSub: boolean,
   isError: boolean
 ) => {
-
   const getResolveValue = () =>
     // TODO Casting as Function manually, or else we get:
     // "Cannot invoke an expression whose type lacks a call signature. Type 'Function | (() => any)' has no compatible call signatures."
-    (typeof resolveValueOrFunction === 'function' ? (resolveValueOrFunction as Function)() : resolveValueOrFunction);
+    typeof resolveValueOrFunction === 'function'
+      ? (resolveValueOrFunction as Function)()
+      : resolveValueOrFunction;
 
   const result = Object.keys(listOfMockRps).reduce(
     (apiObject, namespace: string) => {
@@ -110,7 +124,7 @@ const createApi = (
  */
 export const rejectApi = (
   resolveValueOrFunction = new Error('bar'),
-  isPubsub: boolean = true
+  isPubsub = true
 ) => createApi(resolveValueOrFunction, isPubsub, true);
 
 /**
@@ -119,6 +133,10 @@ export const rejectApi = (
  * @ignore
  */
 export const resolveApi = (
-  resolveValueOrFunction: string | object | (() => any) | { error: string } = 'foo',
-  isPubsub: boolean = true
+  resolveValueOrFunction:
+    | string
+    | object
+    | (() => any)
+    | { error: string } = 'foo',
+  isPubsub = true
 ) => createApi(resolveValueOrFunction, isPubsub, false);
diff --git a/packages/light.js/src/utils/testHelpers/sleep.ts b/packages/light.js/src/utils/testHelpers/sleep.ts
index 26d6db35..19517d2f 100644
--- a/packages/light.js/src/utils/testHelpers/sleep.ts
+++ b/packages/light.js/src/utils/testHelpers/sleep.ts
@@ -4,6 +4,7 @@
 // SPDX-License-Identifier: MIT
 
 // TODO Use fake timers instead
-export default (duration: number) => new Promise((resolve, reject) => {
-  setTimeout(resolve, duration);
-});
+export default (duration: number) =>
+  new Promise(resolve => {
+    setTimeout(resolve, duration);
+  });
diff --git a/scripts/lint-files.sh b/scripts/lint-files.sh
new file mode 100755
index 00000000..976c0cf7
--- /dev/null
+++ b/scripts/lint-files.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+
+# Apply `prettier` and `eslint` in two steps, because some `semistandard` rules
+# aren't supported by `prettier`, e.g. https://github.com/prettier/prettier/issues/3845
+
+[ $# -eq 0 ] && exit 0; # Exit successfully if no arguments
+
+set -e # Exit with error if any command fails
+
+echo 'Linting...'
+
+yarn prettier --loglevel error --write $@
+yarn eslint --fix $@
diff --git a/tslint.json b/tslint.json
deleted file mode 100644
index 4281b8e2..00000000
--- a/tslint.json
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-  "extends": ["tslint-config-semistandard"],
-  "linterOptions": {
-    "exclude": ["**/node_modules/**/*", "**/lib/**/*", "**/example/**/*"]
-  }
-}
diff --git a/yarn.lock b/yarn.lock
index 406edd14..eb03e164 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1182,6 +1182,11 @@
     "@types/cheerio" "*"
     "@types/react" "*"
 
+"@types/eslint-visitor-keys@^1.0.0":
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/@types/eslint-visitor-keys/-/eslint-visitor-keys-1.0.0.tgz#1ee30d79544ca84d68d4b3cdb0af4f205663dd2d"
+  integrity sha512-OCutwjDZ4aFS6PB1UZ988C4YgwlBHJd6wCeQqaLdmadZ/7e+w79+hbMUFC1QXDNCmdyoRfAFdm0RypzwR+Qpag==
+
 "@types/events@*":
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/@types/events/-/events-3.0.0.tgz#2862f3f58a9a7f7c3e78d79f130dd4d71c25c2a7"
@@ -1247,6 +1252,16 @@
   dependencies:
     "@types/jest-diff" "*"
 
+"@types/json-schema@^7.0.3":
+  version "7.0.3"
+  resolved "https://registry.yarnpkg.com/@types/json-schema/-/json-schema-7.0.3.tgz#bdfd69d61e464dcc81b25159c270d75a73c1a636"
+  integrity sha512-Il2DtDVRGDcqjDtE+rF8iqg1CArehSK84HZJCT7AMITlyXRBpuPhqGLDQMowraqqu1coEaimg4ZOqggt6L6L+A==
+
+"@types/json5@^0.0.29":
+  version "0.0.29"
+  resolved "https://registry.yarnpkg.com/@types/json5/-/json5-0.0.29.tgz#ee28707ae94e11d2b827bcbe5270bcea7f3e71ee"
+  integrity sha1-7ihweulOEdK4J7y+UnC86n8+ce4=
+
 "@types/lodash@^4.14.110":
   version "4.14.136"
   resolved "https://registry.yarnpkg.com/@types/lodash/-/lodash-4.14.136.tgz#413e85089046b865d960c9ff1d400e04c31ab60f"
@@ -1325,6 +1340,63 @@
   resolved "https://registry.yarnpkg.com/@types/yargs/-/yargs-12.0.12.tgz#45dd1d0638e8c8f153e87d296907659296873916"
   integrity sha512-SOhuU4wNBxhhTHxYaiG5NY4HBhDIDnJF60GU+2LqHAdKKer86//e4yg69aENCtQ04n0ovz+tq2YPME5t5yp4pw==
 
+"@typescript-eslint/eslint-plugin@^2.2.0":
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-2.2.0.tgz#cba8caa6ad8df544c46bca674125a31af8c9ac2f"
+  integrity sha512-rOodtI+IvaO8USa6ValYOrdWm9eQBgqwsY+B0PPiB+aSiK6p6Z4l9jLn/jI3z3WM4mkABAhKIqvGIBl0AFRaLQ==
+  dependencies:
+    "@typescript-eslint/experimental-utils" "2.2.0"
+    eslint-utils "^1.4.2"
+    functional-red-black-tree "^1.0.1"
+    regexpp "^2.0.1"
+    tsutils "^3.17.1"
+
+"@typescript-eslint/experimental-utils@2.2.0":
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/experimental-utils/-/experimental-utils-2.2.0.tgz#31d855fbc425168ecf56960c777aacfcca391cff"
+  integrity sha512-IMhbewFs27Frd/ICHBRfIcsUCK213B8MsEUqvKFK14SDPjPR5JF6jgOGPlroybFTrGWpMvN5tMZdXAf+xcmxsA==
+  dependencies:
+    "@types/json-schema" "^7.0.3"
+    "@typescript-eslint/typescript-estree" "2.2.0"
+    eslint-scope "^5.0.0"
+
+"@typescript-eslint/experimental-utils@^1.13.0":
+  version "1.13.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/experimental-utils/-/experimental-utils-1.13.0.tgz#b08c60d780c0067de2fb44b04b432f540138301e"
+  integrity sha512-zmpS6SyqG4ZF64ffaJ6uah6tWWWgZ8m+c54XXgwFtUv0jNz8aJAVx8chMCvnk7yl6xwn8d+d96+tWp7fXzTuDg==
+  dependencies:
+    "@types/json-schema" "^7.0.3"
+    "@typescript-eslint/typescript-estree" "1.13.0"
+    eslint-scope "^4.0.0"
+
+"@typescript-eslint/parser@^2.2.0":
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-2.2.0.tgz#3cd758ed85ae9be06667beb61bbdf8060f274fb7"
+  integrity sha512-0mf893kj9L65O5sA7wP6EoYvTybefuRFavUNhT7w9kjhkdZodoViwVS+k3D+ZxKhvtL7xGtP/y/cNMJX9S8W4A==
+  dependencies:
+    "@types/eslint-visitor-keys" "^1.0.0"
+    "@typescript-eslint/experimental-utils" "2.2.0"
+    "@typescript-eslint/typescript-estree" "2.2.0"
+    eslint-visitor-keys "^1.1.0"
+
+"@typescript-eslint/typescript-estree@1.13.0":
+  version "1.13.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-1.13.0.tgz#8140f17d0f60c03619798f1d628b8434913dc32e"
+  integrity sha512-b5rCmd2e6DCC6tCTN9GSUAuxdYwCM/k/2wdjHGrIRGPSJotWMCe/dGpi66u42bhuh8q3QBzqM4TMA1GUUCJvdw==
+  dependencies:
+    lodash.unescape "4.0.1"
+    semver "5.5.0"
+
+"@typescript-eslint/typescript-estree@2.2.0":
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-2.2.0.tgz#1e2aad5ed573f9f7a8e3261eb79404264c4fc57f"
+  integrity sha512-9/6x23A3HwWWRjEQbuR24on5XIfVmV96cDpGR9671eJv1ebFKHj2sGVVAwkAVXR2UNuhY1NeKS2QMv5P8kQb2Q==
+  dependencies:
+    glob "^7.1.4"
+    is-glob "^4.0.1"
+    lodash.unescape "4.0.1"
+    semver "^6.3.0"
+
 "@zkochan/cmd-shim@^3.1.0":
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/@zkochan/cmd-shim/-/cmd-shim-3.1.0.tgz#2ab8ed81f5bb5452a85f25758eb9b8681982fd2e"
@@ -1360,6 +1432,11 @@ acorn-globals@^4.1.0, acorn-globals@^4.3.0:
     acorn "^6.0.1"
     acorn-walk "^6.0.1"
 
+acorn-jsx@^5.0.2:
+  version "5.0.2"
+  resolved "https://registry.yarnpkg.com/acorn-jsx/-/acorn-jsx-5.0.2.tgz#84b68ea44b373c4f8686023a551f61a21b7c4a4f"
+  integrity sha512-tiNTrP1MP0QrChmD2DdupCr6HWSFeKVw5d/dHTu4Y7rkAkRhU/Dt7dphAfIUyxtHpl/eBVip5uTNSpQJHylpAw==
+
 acorn-walk@^6.0.1:
   version "6.2.0"
   resolved "https://registry.yarnpkg.com/acorn-walk/-/acorn-walk-6.2.0.tgz#123cb8f3b84c2171f1f7fb252615b1c78a6b1a8c"
@@ -1375,6 +1452,11 @@ acorn@^6.0.1, acorn@^6.0.4:
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.2.1.tgz#3ed8422d6dec09e6121cc7a843ca86a330a86b51"
   integrity sha512-JD0xT5FCRDNyjDda3Lrg/IxFscp9q4tiYtxE1/nOzlKCk7hIRuYjhq1kCNkbPjMRMZuFq20HNQn1I9k8Oj0E+Q==
 
+acorn@^7.0.0:
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-7.0.0.tgz#26b8d1cd9a9b700350b71c0905546f64d1284e7a"
+  integrity sha512-PaF/MduxijYYt7unVGRuds1vBC9bFxbNf+VWqhOClfdgy7RlVkQqt610ig1/yxTgsDIfW1cWDel5EBbOy3jdtQ==
+
 agent-base@4, agent-base@^4.3.0:
   version "4.3.0"
   resolved "https://registry.yarnpkg.com/agent-base/-/agent-base-4.3.0.tgz#8165f01c436009bccad0b1d122f05ed770efc6ee"
@@ -1412,7 +1494,7 @@ airbnb-prop-types@^2.13.2:
     prop-types-exact "^1.2.0"
     react-is "^16.8.6"
 
-ajv@^6.5.5:
+ajv@^6.10.0, ajv@^6.10.2, ajv@^6.5.5:
   version "6.10.2"
   resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.10.2.tgz#d3cea04d6b017b2894ad69040fec8b623eb4bd52"
   integrity sha512-TXtUUEYHuaTEbLZWIKUr5pmBuhDLy+8KYtPYdcV8qC+pOZL+NKqYwvWSRrVXHn+ZmRRAu8vJTAznH7Oag6RVRw==
@@ -1582,6 +1664,14 @@ array-ify@^1.0.0:
   resolved "https://registry.yarnpkg.com/array-ify/-/array-ify-1.0.0.tgz#9e528762b4a9066ad163a6962a364418e9626ece"
   integrity sha1-nlKHYrSpBmrRY6aWKjZEGOlibs4=
 
+array-includes@^3.0.3:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/array-includes/-/array-includes-3.0.3.tgz#184b48f62d92d7452bb31b323165c7f8bd02266d"
+  integrity sha1-GEtI9i2S10UrsxsyMWXH+L0CJm0=
+  dependencies:
+    define-properties "^1.1.2"
+    es-abstract "^1.7.0"
+
 array-initial@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/array-initial/-/array-initial-1.1.0.tgz#2fa74b26739371c3947bd7a7adc73be334b3d795"
@@ -1942,11 +2032,6 @@ buffer-from@1.x, buffer-from@^1.0.0:
   resolved "https://registry.yarnpkg.com/buffer-from/-/buffer-from-1.1.1.tgz#32713bc028f75c02fdb710d7c7bcec1f2c6070ef"
   integrity sha512-MQcXEUbCKtEo7bhqEs6560Hyd4XaovZlO/k9V3hjVUF/zwW7KBVdSK4gIt/bzwS9MbR5qob+F5jusZsb0YQK2A==
 
-builtin-modules@^1.1.1:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/builtin-modules/-/builtin-modules-1.1.1.tgz#270f076c5a72c02f5b65a47df94c5fe3a278892f"
-  integrity sha1-Jw8HbFpywC9bZaR9+Uxf46J4iS8=
-
 builtins@^1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/builtins/-/builtins-1.0.3.tgz#cb94faeb61c8696451db36534e1422f94f0aee88"
@@ -2104,7 +2189,7 @@ chai@^4.1.2:
     pathval "^1.1.0"
     type-detect "^4.0.5"
 
-chalk@^2.0.0, chalk@^2.0.1, chalk@^2.3.0, chalk@^2.3.1, chalk@^2.4.2:
+chalk@^2.0.0, chalk@^2.0.1, chalk@^2.1.0, chalk@^2.3.1, chalk@^2.4.2:
   version "2.4.2"
   resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.4.2.tgz#cd42541677a54333cf541a49108c1432b44c9424"
   integrity sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==
@@ -2321,7 +2406,7 @@ commander@2.9.0:
   dependencies:
     graceful-readlink ">= 1.0.0"
 
-commander@^2.12.1, commander@^2.19.0, commander@~2.20.0:
+commander@^2.19.0, commander@~2.20.0:
   version "2.20.0"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.0.tgz#d58bb2b5c1ee8f87b0d340027e9e94e222c5a422"
   integrity sha512-7j2y+40w61zy6YC2iRNpUe/NwhNyoXrYpHMrSunaMG64nRnaf96zO/KMQR4OyN/UnE5KLyEBnKHd4aG3rskjpQ==
@@ -2377,6 +2462,11 @@ console-control-strings@^1.0.0, console-control-strings@~1.1.0:
   resolved "https://registry.yarnpkg.com/console-control-strings/-/console-control-strings-1.1.0.tgz#3d7cf4464db6446ea644bf4b39507f9851008e8e"
   integrity sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4=
 
+contains-path@^0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/contains-path/-/contains-path-0.1.0.tgz#fe8cf184ff6670b6baef01a9d4861a5cbec4120a"
+  integrity sha1-/ozxhP9mcLa67wGp1IYaXL7EEgo=
+
 conventional-changelog-angular@^5.0.3:
   version "5.0.3"
   resolved "https://registry.yarnpkg.com/conventional-changelog-angular/-/conventional-changelog-angular-5.0.3.tgz#299fdd43df5a1f095283ac16aeedfb0a682ecab0"
@@ -2643,7 +2733,7 @@ debug@2.6.8:
   dependencies:
     ms "2.0.0"
 
-debug@2.6.9, debug@^2.1.3, debug@^2.2.0, debug@^2.3.3:
+debug@2.6.9, debug@^2.1.3, debug@^2.2.0, debug@^2.3.3, debug@^2.6.8, debug@^2.6.9:
   version "2.6.9"
   resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.9.tgz#5d128515df134ff327e90a4c93f4e077a536341f"
   integrity sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==
@@ -2664,7 +2754,7 @@ debug@^3.0.0, debug@^3.1.0, debug@^3.2.6:
   dependencies:
     ms "^2.1.1"
 
-debug@^4.1.0, debug@^4.1.1:
+debug@^4.0.1, debug@^4.1.0, debug@^4.1.1:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/debug/-/debug-4.1.1.tgz#3b72260255109c6b589cee050f1d516139664791"
   integrity sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==
@@ -2740,6 +2830,11 @@ deepmerge@4.0.0:
   resolved "https://registry.yarnpkg.com/deepmerge/-/deepmerge-4.0.0.tgz#3e3110ca29205f120d7cb064960a39c3d2087c09"
   integrity sha512-YZ1rOP5+kHor4hMAH+HRQnBQHg+wvS1un1hAOuIcxcBy0hzcUf6Jg2a1w65kpoOUnurOfZbERwjI1TfZxNjcww==
 
+deepmerge@^2.0.1:
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/deepmerge/-/deepmerge-2.2.1.tgz#5d3ff22a01c00f645405a2fbc17d0778a1801170"
+  integrity sha512-R9hc1Xa/NOBi9WRVUWg19rl1UB7Tt4kuPd+thNJgFZoxXsTz7ncaPaeIm+40oSGuP33DfMb4sZt1QIGiJzC4EA==
+
 default-compare@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/default-compare/-/default-compare-1.0.0.tgz#cb61131844ad84d84788fb68fd01681ca7781a2f"
@@ -2841,11 +2936,6 @@ diff@3.2.0:
   resolved "https://registry.yarnpkg.com/diff/-/diff-3.2.0.tgz#c9ce393a4b7cbd0b058a725c93df299027868ff9"
   integrity sha1-yc45Okt8vQsFinJck98pkCeGj/k=
 
-diff@^3.2.0:
-  version "3.5.0"
-  resolved "https://registry.yarnpkg.com/diff/-/diff-3.5.0.tgz#800c0dd1e0a8bfbc95835c202ad220fe317e5a12"
-  integrity sha512-A46qtFgd+g7pDZinpnwiRJtxbC1hpgf0uzP3iG89scHk0AUC7A1TGxf5OiiOUv/JMZR8GOt8hL900hV0bOy5xA==
-
 diff@^4.0.1:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/diff/-/diff-4.0.1.tgz#0c667cb467ebbb5cea7f14f135cc2dba7780a8ff"
@@ -2863,13 +2953,20 @@ discontinuous-range@1.0.0:
   resolved "https://registry.yarnpkg.com/discontinuous-range/-/discontinuous-range-1.0.0.tgz#e38331f0844bba49b9a9cb71c771585aab1bc65a"
   integrity sha1-44Mx8IRLukm5qctxx3FYWqsbxlo=
 
-doctrine@0.7.2, doctrine@^0.7.2:
-  version "0.7.2"
-  resolved "https://registry.yarnpkg.com/doctrine/-/doctrine-0.7.2.tgz#7cb860359ba3be90e040b26b729ce4bfa654c523"
-  integrity sha1-fLhgNZujvpDgQLJrcpzkv6ZUxSM=
+doctrine@1.5.0:
+  version "1.5.0"
+  resolved "https://registry.yarnpkg.com/doctrine/-/doctrine-1.5.0.tgz#379dce730f6166f76cefa4e6707a159b02c5a6fa"
+  integrity sha1-N53Ocw9hZvds76TmcHoVmwLFpvo=
   dependencies:
-    esutils "^1.1.6"
-    isarray "0.0.1"
+    esutils "^2.0.2"
+    isarray "^1.0.0"
+
+doctrine@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/doctrine/-/doctrine-3.0.0.tgz#addebead72a6574db783639dc87a121773973961"
+  integrity sha512-yS+Q5i3hBf7GBkd4KG8a7eBNNWNGLTaEwwYWUijIYM7zrlYDM0BFXHjjPWlWZ1Rg7UaddZeIDmi9jF3HmqiQ2w==
+  dependencies:
+    esutils "^2.0.2"
 
 dom-serializer@0, dom-serializer@~0.1.1:
   version "0.1.1"
@@ -2997,6 +3094,11 @@ electron@^4.0.1:
     electron-download "^4.1.0"
     extract-zip "^1.0.3"
 
+emoji-regex@^7.0.1:
+  version "7.0.3"
+  resolved "https://registry.yarnpkg.com/emoji-regex/-/emoji-regex-7.0.3.tgz#933a04052860c85e83c122479c4748a8e4c72156"
+  integrity sha512-CwBLREIQ7LvYFB0WyRvwhq5N5qPhc6PMjD6bYggFlI5YyDgl+0vxq5VHbMOFqLg7hfWzmu8T5Z1QofhmTIhItA==
+
 encoding@^0.1.11:
   version "0.1.12"
   resolved "https://registry.yarnpkg.com/encoding/-/encoding-0.1.12.tgz#538b66f3ee62cd1ab51ec323829d1f9480c74beb"
@@ -3113,6 +3215,22 @@ es-abstract@^1.10.0, es-abstract@^1.11.0, es-abstract@^1.12.0, es-abstract@^1.13
     is-regex "^1.0.4"
     object-keys "^1.0.12"
 
+es-abstract@^1.7.0:
+  version "1.14.2"
+  resolved "https://registry.yarnpkg.com/es-abstract/-/es-abstract-1.14.2.tgz#7ce108fad83068c8783c3cdf62e504e084d8c497"
+  integrity sha512-DgoQmbpFNOofkjJtKwr87Ma5EW4Dc8fWhD0R+ndq7Oc456ivUfGOOP6oAZTTKl5/CcNMP+EN+e3/iUzgE0veZg==
+  dependencies:
+    es-to-primitive "^1.2.0"
+    function-bind "^1.1.1"
+    has "^1.0.3"
+    has-symbols "^1.0.0"
+    is-callable "^1.1.4"
+    is-regex "^1.0.4"
+    object-inspect "^1.6.0"
+    object-keys "^1.1.1"
+    string.prototype.trimleft "^2.0.0"
+    string.prototype.trimright "^2.0.0"
+
 es-to-primitive@^1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/es-to-primitive/-/es-to-primitive-1.2.0.tgz#edf72478033456e8dda8ef09e00ad9650707f377"
@@ -3192,6 +3310,182 @@ escodegen@^1.11.0, escodegen@^1.9.1:
   optionalDependencies:
     source-map "~0.6.1"
 
+eslint-config-semistandard@^15.0.0:
+  version "15.0.0"
+  resolved "https://registry.yarnpkg.com/eslint-config-semistandard/-/eslint-config-semistandard-15.0.0.tgz#d8eefccfac4ca9cbc508d38de6cb8fd5e7a72fa9"
+  integrity sha512-volIMnosUvzyxGkYUA5QvwkahZZLeUx7wcS0+7QumPn+MMEBbV6P7BY1yukamMst0w3Et3QZlCjQEwQ8tQ6nug==
+
+eslint-config-standard@^14.0.0:
+  version "14.1.0"
+  resolved "https://registry.yarnpkg.com/eslint-config-standard/-/eslint-config-standard-14.1.0.tgz#b23da2b76fe5a2eba668374f246454e7058f15d4"
+  integrity sha512-EF6XkrrGVbvv8hL/kYa/m6vnvmUT+K82pJJc4JJVMM6+Qgqh0pnwprSxdduDLB9p/7bIxD+YV5O0wfb8lmcPbA==
+
+eslint-import-resolver-node@^0.3.2:
+  version "0.3.2"
+  resolved "https://registry.yarnpkg.com/eslint-import-resolver-node/-/eslint-import-resolver-node-0.3.2.tgz#58f15fb839b8d0576ca980413476aab2472db66a"
+  integrity sha512-sfmTqJfPSizWu4aymbPr4Iidp5yKm8yDkHp+Ir3YiTHiiDfxh69mOUsmiqW6RZ9zRXFaF64GtYmN7e+8GHBv6Q==
+  dependencies:
+    debug "^2.6.9"
+    resolve "^1.5.0"
+
+eslint-import-resolver-typescript@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/eslint-import-resolver-typescript/-/eslint-import-resolver-typescript-1.1.1.tgz#e6d42172b95144ef16610fe104ef38340edea591"
+  integrity sha512-jqSfumQ+H5y3FUJ6NjRkbOQSUOlbBucGTN3ELymOtcDBbPjVdm/luvJuCfCaIXGh8sEF26ma1qVdtDgl9ndhUg==
+  dependencies:
+    debug "^4.0.1"
+    resolve "^1.4.0"
+    tsconfig-paths "^3.6.0"
+
+eslint-module-utils@^2.4.0:
+  version "2.4.1"
+  resolved "https://registry.yarnpkg.com/eslint-module-utils/-/eslint-module-utils-2.4.1.tgz#7b4675875bf96b0dbf1b21977456e5bb1f5e018c"
+  integrity sha512-H6DOj+ejw7Tesdgbfs4jeS4YMFrT8uI8xwd1gtQqXssaR0EQ26L+2O/w6wkYFy2MymON0fTwHmXBvvfLNZVZEw==
+  dependencies:
+    debug "^2.6.8"
+    pkg-dir "^2.0.0"
+
+eslint-plugin-es@^1.4.1:
+  version "1.4.1"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-es/-/eslint-plugin-es-1.4.1.tgz#12acae0f4953e76ba444bfd1b2271081ac620998"
+  integrity sha512-5fa/gR2yR3NxQf+UXkeLeP8FBBl6tSgdrAz1+cF84v1FMM4twGwQoqTnn+QxFLcPOrF4pdKEJKDB/q9GoyJrCA==
+  dependencies:
+    eslint-utils "^1.4.2"
+    regexpp "^2.0.1"
+
+eslint-plugin-import@^2.18.2:
+  version "2.18.2"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-import/-/eslint-plugin-import-2.18.2.tgz#02f1180b90b077b33d447a17a2326ceb400aceb6"
+  integrity sha512-5ohpsHAiUBRNaBWAF08izwUGlbrJoJJ+W9/TBwsGoR1MnlgfwMIKrFeSjWbt6moabiXW9xNvtFz+97KHRfI4HQ==
+  dependencies:
+    array-includes "^3.0.3"
+    contains-path "^0.1.0"
+    debug "^2.6.9"
+    doctrine "1.5.0"
+    eslint-import-resolver-node "^0.3.2"
+    eslint-module-utils "^2.4.0"
+    has "^1.0.3"
+    minimatch "^3.0.4"
+    object.values "^1.1.0"
+    read-pkg-up "^2.0.0"
+    resolve "^1.11.0"
+
+eslint-plugin-jest@^22.17.0:
+  version "22.17.0"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-jest/-/eslint-plugin-jest-22.17.0.tgz#dc170ec8369cd1bff9c5dd8589344e3f73c88cf6"
+  integrity sha512-WT4DP4RoGBhIQjv+5D0FM20fAdAUstfYAf/mkufLNTojsfgzc5/IYW22cIg/Q4QBavAZsROQlqppiWDpFZDS8Q==
+  dependencies:
+    "@typescript-eslint/experimental-utils" "^1.13.0"
+
+eslint-plugin-json@^1.4.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-json/-/eslint-plugin-json-1.4.0.tgz#4d29f3a4c08d412df739bd65049ce23636515af8"
+  integrity sha512-CECvgRAWtUzuepdlPWd+VA7fhyF9HT183pZnl8wQw5x699Mk/MbME/q8xtULBfooi3LUbj6fToieNmsvUcDxWA==
+  dependencies:
+    vscode-json-languageservice "^3.2.1"
+
+eslint-plugin-node@^9.1.0:
+  version "9.2.0"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-node/-/eslint-plugin-node-9.2.0.tgz#b1911f111002d366c5954a6d96d3cd5bf2a3036a"
+  integrity sha512-2abNmzAH/JpxI4gEOwd6K8wZIodK3BmHbTxz4s79OIYwwIt2gkpEXlAouJXu4H1c9ySTnRso0tsuthSOZbUMlA==
+  dependencies:
+    eslint-plugin-es "^1.4.1"
+    eslint-utils "^1.4.2"
+    ignore "^5.1.1"
+    minimatch "^3.0.4"
+    resolve "^1.10.1"
+    semver "^6.1.0"
+
+eslint-plugin-promise@^4.2.1:
+  version "4.2.1"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-promise/-/eslint-plugin-promise-4.2.1.tgz#845fd8b2260ad8f82564c1222fce44ad71d9418a"
+  integrity sha512-VoM09vT7bfA7D+upt+FjeBO5eHIJQBUWki1aPvB+vbNiHS3+oGIJGIeyBtKQTME6UPXXy3vV07OL1tHd3ANuDw==
+
+eslint-plugin-standard@^4.0.0:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-standard/-/eslint-plugin-standard-4.0.1.tgz#ff0519f7ffaff114f76d1bd7c3996eef0f6e20b4"
+  integrity sha512-v/KBnfyaOMPmZc/dmc6ozOdWqekGp7bBGq4jLAecEfPGmfKiWS4sA8sC0LqiV9w5qmXAtXVn4M3p1jSyhY85SQ==
+
+eslint-scope@^4.0.0:
+  version "4.0.3"
+  resolved "https://registry.yarnpkg.com/eslint-scope/-/eslint-scope-4.0.3.tgz#ca03833310f6889a3264781aa82e63eb9cfe7848"
+  integrity sha512-p7VutNr1O/QrxysMo3E45FjYDTeXBy0iTltPFNSqKAIfjDSXC+4dj+qfyuD8bfAXrW/y6lW3O76VaYNPKfpKrg==
+  dependencies:
+    esrecurse "^4.1.0"
+    estraverse "^4.1.1"
+
+eslint-scope@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/eslint-scope/-/eslint-scope-5.0.0.tgz#e87c8887c73e8d1ec84f1ca591645c358bfc8fb9"
+  integrity sha512-oYrhJW7S0bxAFDvWqzvMPRm6pcgcnWc4QnofCAqRTRfQC0JcwenzGglTtsLyIuuWFfkqDG9vz67cnttSd53djw==
+  dependencies:
+    esrecurse "^4.1.0"
+    estraverse "^4.1.1"
+
+eslint-utils@^1.4.2:
+  version "1.4.2"
+  resolved "https://registry.yarnpkg.com/eslint-utils/-/eslint-utils-1.4.2.tgz#166a5180ef6ab7eb462f162fd0e6f2463d7309ab"
+  integrity sha512-eAZS2sEUMlIeCjBeubdj45dmBHQwPHWyBcT1VSYB7o9x9WRRqKxyUoiXlRjyAwzN7YEzHJlYg0NmzDRWx6GP4Q==
+  dependencies:
+    eslint-visitor-keys "^1.0.0"
+
+eslint-visitor-keys@^1.0.0, eslint-visitor-keys@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-1.1.0.tgz#e2a82cea84ff246ad6fb57f9bde5b46621459ec2"
+  integrity sha512-8y9YjtM1JBJU/A9Kc+SbaOV4y29sSWckBwMHa+FGtVj5gN/sbnKDf6xJUl+8g7FAij9LVaP8C24DUiH/f/2Z9A==
+
+eslint@^6.3.0:
+  version "6.3.0"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-6.3.0.tgz#1f1a902f67bfd4c354e7288b81e40654d927eb6a"
+  integrity sha512-ZvZTKaqDue+N8Y9g0kp6UPZtS4FSY3qARxBs7p4f0H0iof381XHduqVerFWtK8DPtKmemqbqCFENWSQgPR/Gow==
+  dependencies:
+    "@babel/code-frame" "^7.0.0"
+    ajv "^6.10.0"
+    chalk "^2.1.0"
+    cross-spawn "^6.0.5"
+    debug "^4.0.1"
+    doctrine "^3.0.0"
+    eslint-scope "^5.0.0"
+    eslint-utils "^1.4.2"
+    eslint-visitor-keys "^1.1.0"
+    espree "^6.1.1"
+    esquery "^1.0.1"
+    esutils "^2.0.2"
+    file-entry-cache "^5.0.1"
+    functional-red-black-tree "^1.0.1"
+    glob-parent "^5.0.0"
+    globals "^11.7.0"
+    ignore "^4.0.6"
+    import-fresh "^3.0.0"
+    imurmurhash "^0.1.4"
+    inquirer "^6.4.1"
+    is-glob "^4.0.0"
+    js-yaml "^3.13.1"
+    json-stable-stringify-without-jsonify "^1.0.1"
+    levn "^0.3.0"
+    lodash "^4.17.14"
+    minimatch "^3.0.4"
+    mkdirp "^0.5.1"
+    natural-compare "^1.4.0"
+    optionator "^0.8.2"
+    progress "^2.0.0"
+    regexpp "^2.0.1"
+    semver "^6.1.2"
+    strip-ansi "^5.2.0"
+    strip-json-comments "^3.0.1"
+    table "^5.2.3"
+    text-table "^0.2.0"
+    v8-compile-cache "^2.0.3"
+
+espree@^6.1.1:
+  version "6.1.1"
+  resolved "https://registry.yarnpkg.com/espree/-/espree-6.1.1.tgz#7f80e5f7257fc47db450022d723e356daeb1e5de"
+  integrity sha512-EYbr8XZUhWbYCqQRW0duU5LxzL5bETN6AjKBGy1302qqzPaCH10QbRg3Wvco79Z8x9WbiE8HYB4e75xl6qUYvQ==
+  dependencies:
+    acorn "^7.0.0"
+    acorn-jsx "^5.0.2"
+    eslint-visitor-keys "^1.1.0"
+
 esprima@^3.1.3:
   version "3.1.3"
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-3.1.3.tgz#fdca51cee6133895e3c88d535ce49dbff62a4633"
@@ -3202,16 +3496,30 @@ esprima@^4.0.0:
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.1.tgz#13b04cdb3e6c5d19df91ab6987a8695619b0aa71"
   integrity sha512-eGuFFw7Upda+g4p+QHvnW0RyTX/SVeJBDM/gCtMARO0cLuT2HcEKnTPvhjV6aGeqrCB/sbNop0Kszm0jsaWU4A==
 
+esquery@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/esquery/-/esquery-1.0.1.tgz#406c51658b1f5991a5f9b62b1dc25b00e3e5c708"
+  integrity sha512-SmiyZ5zIWH9VM+SRUReLS5Q8a7GxtRdxEBVZpm98rJM7Sb+A9DVCndXfkeFUd3byderg+EbDkfnevfCwynWaNA==
+  dependencies:
+    estraverse "^4.0.0"
+
+esrecurse@^4.1.0:
+  version "4.2.1"
+  resolved "https://registry.yarnpkg.com/esrecurse/-/esrecurse-4.2.1.tgz#007a3b9fdbc2b3bb87e4879ea19c92fdbd3942cf"
+  integrity sha512-64RBB++fIOAXPw3P9cy89qfMlvZEXZkqqJkjqqXIvzP5ezRZjW+lPWjw35UX/3EhUPFYbg5ER4JYgDw4007/DQ==
+  dependencies:
+    estraverse "^4.1.0"
+
+estraverse@^4.0.0, estraverse@^4.1.0, estraverse@^4.1.1:
+  version "4.3.0"
+  resolved "https://registry.yarnpkg.com/estraverse/-/estraverse-4.3.0.tgz#398ad3f3c5a24948be7725e83d11a7de28cdbd1d"
+  integrity sha512-39nnKffWz8xN1BU/2c79n9nB9HDzo0niYUqx6xyqUnyoAnQyyWpOTdZEeiCch8BBu515t4wp9ZmgVfVhn9EBpw==
+
 estraverse@^4.2.0:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/estraverse/-/estraverse-4.2.0.tgz#0dee3fed31fcd469618ce7342099fc1afa0bdb13"
   integrity sha1-De4/7TH81GlhjOc0IJn8GvoL2xM=
 
-esutils@^1.1.6:
-  version "1.1.6"
-  resolved "https://registry.yarnpkg.com/esutils/-/esutils-1.1.6.tgz#c01ccaa9ae4b897c6d0c3e210ae52f3c7a844375"
-  integrity sha1-wBzKqa5LiXxtDD4hCuUvPHqEQ3U=
-
 esutils@^2.0.2:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/esutils/-/esutils-2.0.2.tgz#0abf4f1caa5bcb1f7a9d8acc6dea4faaa04bac9b"
@@ -3439,6 +3747,13 @@ figures@^2.0.0:
   dependencies:
     escape-string-regexp "^1.0.5"
 
+file-entry-cache@^5.0.1:
+  version "5.0.1"
+  resolved "https://registry.yarnpkg.com/file-entry-cache/-/file-entry-cache-5.0.1.tgz#ca0f6efa6dd3d561333fb14515065c2fafdf439c"
+  integrity sha512-bCg29ictuBaKUwwArK4ouCaqDgLZcysCFLmM/Yn/FDoqndh/9vNuQfXRDvTuXKLxfD/JtZQGKFT8MGcJBK644g==
+  dependencies:
+    flat-cache "^2.0.1"
+
 fill-range@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/fill-range/-/fill-range-4.0.0.tgz#d544811d428f98eb06a63dc402d2403c328c38f7"
@@ -3457,7 +3772,7 @@ find-up@^1.0.0:
     path-exists "^2.0.0"
     pinkie-promise "^2.0.0"
 
-find-up@^2.0.0:
+find-up@^2.0.0, find-up@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/find-up/-/find-up-2.1.0.tgz#45d1b7e506c717ddd482775a2b77920a3c0c57a7"
   integrity sha1-RdG35QbHF93UgndaK3eSCjwMV6c=
@@ -3507,6 +3822,20 @@ flagged-respawn@^1.0.0:
   resolved "https://registry.yarnpkg.com/flagged-respawn/-/flagged-respawn-1.0.1.tgz#e7de6f1279ddd9ca9aac8a5971d618606b3aab41"
   integrity sha512-lNaHNVymajmk0OJMBn8fVUAU1BtDeKIqKoVhk4xAALB57aALg6b4W0MfJ/cUE0g9YBXy5XhSlPIpYIJ7HaY/3Q==
 
+flat-cache@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/flat-cache/-/flat-cache-2.0.1.tgz#5d296d6f04bda44a4630a301413bdbc2ec085ec0"
+  integrity sha512-LoQe6yDuUMDzQAEH8sgmh4Md6oZnc/7PjtwjNFSzveXqSHt6ka9fPBuso7IGf9Rz4uqnSnWiFH2B/zj24a5ReA==
+  dependencies:
+    flatted "^2.0.0"
+    rimraf "2.6.3"
+    write "1.0.3"
+
+flatted@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/flatted/-/flatted-2.0.1.tgz#69e57caa8f0eacbc281d2e2cb458d46fdb449e08"
+  integrity sha512-a1hQMktqW9Nmqr5aktAux3JMNqaucxGcjtjWnZLHX7yyPCmlSV3M54nGYbqT8K+0GhF3NBgmJCc3ma+WOgX8Jg==
+
 flush-write-stream@^1.0.0, flush-write-stream@^1.0.2:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/flush-write-stream/-/flush-write-stream-1.1.1.tgz#8dd7d873a1babc207d94ead0c2e0e44276ebf2e8"
@@ -3656,6 +3985,11 @@ function.prototype.name@^1.1.0:
     function-bind "^1.1.1"
     is-callable "^1.1.3"
 
+functional-red-black-tree@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/functional-red-black-tree/-/functional-red-black-tree-1.0.1.tgz#1b0ab3bd553b2a0d6399d29c0e3ea0b252078327"
+  integrity sha1-GwqzvVU7Kg1jmdKcDj6gslIHgyc=
+
 gauge@~2.7.3:
   version "2.7.4"
   resolved "https://registry.yarnpkg.com/gauge/-/gauge-2.7.4.tgz#2c03405c7538c39d7eb37b317022e325fb018bf7"
@@ -3874,7 +4208,7 @@ global@^4.3.2:
     min-document "^2.19.0"
     process "^0.11.10"
 
-globals@^11.1.0:
+globals@^11.1.0, globals@^11.7.0:
   version "11.12.0"
   resolved "https://registry.yarnpkg.com/globals/-/globals-11.12.0.tgz#ab8795338868a0babd8525758018c2a7eb95c42e"
   integrity sha512-WOBp/EEGUiIsJSp7wcv/y6MO+lV9UoncWqxuFfm8eBwzWNgyfBd6Gz+IeKQ9jCmyhoH99g15M3T+QaVHFjizVA==
@@ -4162,11 +4496,16 @@ ignore-walk@^3.0.1:
   dependencies:
     minimatch "^3.0.4"
 
-ignore@^4.0.3:
+ignore@^4.0.3, ignore@^4.0.6:
   version "4.0.6"
   resolved "https://registry.yarnpkg.com/ignore/-/ignore-4.0.6.tgz#750e3db5862087b4737ebac8207ffd1ef27b25fc"
   integrity sha512-cyFDKrqc/YdcWFniJhzI42+AzS+gNwmUzOSFcRCQYwySuBBBy/KjuxWLZ/FHEH6Moq1NizMOBWyTcv8O4OZIMg==
 
+ignore@^5.1.1:
+  version "5.1.4"
+  resolved "https://registry.yarnpkg.com/ignore/-/ignore-5.1.4.tgz#84b7b3dbe64552b6ef0eca99f6743dbec6d97adf"
+  integrity sha512-MzbUSahkTW1u7JpKKjY7LCARd1fU5W2rLdxlM4kdkayuCwZImjkpluF9CM1aLewYJguPDqewLam18Y6AU69A8A==
+
 import-fresh@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/import-fresh/-/import-fresh-2.0.0.tgz#d81355c15612d386c61f9ddd3922d4304822a546"
@@ -4175,6 +4514,14 @@ import-fresh@^2.0.0:
     caller-path "^2.0.0"
     resolve-from "^3.0.0"
 
+import-fresh@^3.0.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/import-fresh/-/import-fresh-3.1.0.tgz#6d33fa1dcef6df930fae003446f33415af905118"
+  integrity sha512-PpuksHKGt8rXfWEr9m9EHIpgyyaltBy8+eF6GJM0QCAxMgxCfucMF3mjecK2QsJr0amJW7gTqh5/wht0z2UhEQ==
+  dependencies:
+    parent-module "^1.0.0"
+    resolve-from "^4.0.0"
+
 import-local@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/import-local/-/import-local-2.0.0.tgz#55070be38a5993cf18ef6db7e961f5bee5c5a09d"
@@ -4256,6 +4603,25 @@ inquirer@^6.2.0:
     strip-ansi "^5.1.0"
     through "^2.3.6"
 
+inquirer@^6.4.1:
+  version "6.5.2"
+  resolved "https://registry.yarnpkg.com/inquirer/-/inquirer-6.5.2.tgz#ad50942375d036d327ff528c08bd5fab089928ca"
+  integrity sha512-cntlB5ghuB0iuO65Ovoi8ogLHiWGs/5yNrtUcKjFhSSiVeAIVpD7koaSU9RM8mpXw5YDi9RdYXGQMaOURB7ycQ==
+  dependencies:
+    ansi-escapes "^3.2.0"
+    chalk "^2.4.2"
+    cli-cursor "^2.1.0"
+    cli-width "^2.0.0"
+    external-editor "^3.0.3"
+    figures "^2.0.0"
+    lodash "^4.17.12"
+    mute-stream "0.0.7"
+    run-async "^2.2.0"
+    rxjs "^6.4.0"
+    string-width "^2.1.0"
+    strip-ansi "^5.1.0"
+    through "^2.3.6"
+
 interpret@^1.0.0, interpret@^1.1.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/interpret/-/interpret-1.2.0.tgz#d5061a6224be58e8083985f5014d844359576296"
@@ -4589,7 +4955,7 @@ isarray@0.0.1:
   resolved "https://registry.yarnpkg.com/isarray/-/isarray-0.0.1.tgz#8a18acfca9a8f4177e09abfc6038939b05d1eedf"
   integrity sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8=
 
-isarray@1.0.0, isarray@~1.0.0:
+isarray@1.0.0, isarray@^1.0.0, isarray@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/isarray/-/isarray-1.0.0.tgz#bb935d48582cba168c06834957a54a3e07124f11"
   integrity sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE=
@@ -5171,6 +5537,18 @@ json5@2.x, json5@^2.1.0:
   dependencies:
     minimist "^1.2.0"
 
+json5@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/json5/-/json5-1.0.1.tgz#779fb0018604fa854eacbf6252180d83543e3dbe"
+  integrity sha512-aKS4WQjPenRxiQsC93MNfjx+nbF4PAdYzmd/1JIj8HYzqfbu86beTuNgXDzPknWk0n0uARlyewZo4s++ES36Ow==
+  dependencies:
+    minimist "^1.2.0"
+
+jsonc-parser@^2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/jsonc-parser/-/jsonc-parser-2.1.1.tgz#83dc3d7a6e7186346b889b1280eefa04446c6d3e"
+  integrity sha512-VC0CjnWJylKB1iov4u76/W/5Ef0ydDkjtYWxoZ9t3HdWlSnZQwZL5MgFikaB/EtQ4RmMEw3tmQzuYnZA2/Ja1g==
+
 jsonfile@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/jsonfile/-/jsonfile-4.0.0.tgz#8771aae0799b64076b76640fca058f9c10e33ecb"
@@ -5301,7 +5679,7 @@ leven@^2.1.0:
   resolved "https://registry.yarnpkg.com/leven/-/leven-2.1.0.tgz#c2e7a9f772094dee9d34202ae8acce4687875580"
   integrity sha1-wuep93IJTe6dNCAq6KzORoeHVYA=
 
-levn@~0.3.0:
+levn@^0.3.0, levn@~0.3.0:
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/levn/-/levn-0.3.0.tgz#3b09924edf9f083c0490fdd4c0bc4421e04764ee"
   integrity sha1-OwmSTt+fCDwEkP3UwLxEIeBHZO4=
@@ -5334,6 +5712,16 @@ load-json-file@^1.0.0:
     pinkie-promise "^2.0.0"
     strip-bom "^2.0.0"
 
+load-json-file@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/load-json-file/-/load-json-file-2.0.0.tgz#7947e42149af80d696cbf797bcaabcfe1fe29ca8"
+  integrity sha1-eUfkIUmvgNaWy/eXvKq8/h/inKg=
+  dependencies:
+    graceful-fs "^4.1.2"
+    parse-json "^2.2.0"
+    pify "^2.0.0"
+    strip-bom "^3.0.0"
+
 load-json-file@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/load-json-file/-/load-json-file-4.0.0.tgz#2f5f45ab91e33216234fd53adab668eb4ec0993b"
@@ -5514,6 +5902,11 @@ lodash.templatesettings@^4.0.0:
   dependencies:
     lodash._reinterpolate "^3.0.0"
 
+lodash.unescape@4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/lodash.unescape/-/lodash.unescape-4.0.1.tgz#bf2249886ce514cda112fae9218cdc065211fc9c"
+  integrity sha1-vyJJiGzlFM2hEvrpIYzcBlIR/Jw=
+
 lodash.uniq@^4.5.0:
   version "4.5.0"
   resolved "https://registry.yarnpkg.com/lodash.uniq/-/lodash.uniq-4.5.0.tgz#d0225373aeb652adc1bc82e4945339a842754773"
@@ -6296,7 +6689,7 @@ object-is@^1.0.1:
   resolved "https://registry.yarnpkg.com/object-is/-/object-is-1.0.1.tgz#0aa60ec9989a0b3ed795cf4d06f62cf1ad6539b6"
   integrity sha1-CqYOyZiaCz7Xlc9NBvYs8a1lObY=
 
-object-keys@^1.0.11, object-keys@^1.0.12:
+object-keys@^1.0.11, object-keys@^1.0.12, object-keys@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/object-keys/-/object-keys-1.1.1.tgz#1c47f272df277f3b1daf061677d9c82e2322c60e"
   integrity sha512-NuAESUOUMrlIXOfHKzD6bpPu3tYt3xvjNdRIQ+FeT0lNb4K8WR70CaDxhuNguS2XG+GjkyMwOzsN5ZktImfhLA==
@@ -6436,7 +6829,7 @@ optimist@~0.3.5:
   dependencies:
     wordwrap "~0.0.2"
 
-optionator@^0.8.1:
+optionator@^0.8.1, optionator@^0.8.2:
   version "0.8.2"
   resolved "https://registry.yarnpkg.com/optionator/-/optionator-0.8.2.tgz#364c5e409d3f4d6301d6c0b4c05bba50180aeb64"
   integrity sha1-NkxeQJ0/TWMB1sC0wFu6UBgK62Q=
@@ -6602,6 +6995,13 @@ parallel-transform@^1.1.0:
     inherits "^2.0.3"
     readable-stream "^2.1.5"
 
+parent-module@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/parent-module/-/parent-module-1.0.1.tgz#691d2709e78c79fae3a156622452d00762caaaa2"
+  integrity sha512-GQ2EWRpQV8/o+Aw8YqtfZZPfNRWZYkbidE9k5rpl/hC3vtHHBfGm2Ifi6qWV+coDGkrUKZAxE3Lot5kcsRlh+g==
+  dependencies:
+    callsites "^3.0.0"
+
 parse-filepath@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/parse-filepath/-/parse-filepath-1.0.2.tgz#a632127f53aaf3d15876f5872f3ffac763d6c891"
@@ -6734,6 +7134,13 @@ path-type@^1.0.0:
     pify "^2.0.0"
     pinkie-promise "^2.0.0"
 
+path-type@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/path-type/-/path-type-2.0.0.tgz#f012ccb8415b7096fc2daa1054c3d72389594c73"
+  integrity sha1-8BLMuEFbcJb8LaoQVMPXI4lZTHM=
+  dependencies:
+    pify "^2.0.0"
+
 path-type@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/path-type/-/path-type-3.0.0.tgz#cef31dc8e0a1a3bb0d105c0cd97cf3bf47f4e36f"
@@ -6790,6 +7197,13 @@ pirates@^4.0.1:
   dependencies:
     node-modules-regexp "^1.0.0"
 
+pkg-dir@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/pkg-dir/-/pkg-dir-2.0.0.tgz#f6d5d1109e19d63edf428e0bd57e12777615334b"
+  integrity sha1-9tXREJ4Z1j7fQo4L1X4Sd3YVM0s=
+  dependencies:
+    find-up "^2.1.0"
+
 pkg-dir@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/pkg-dir/-/pkg-dir-3.0.0.tgz#2749020f239ed990881b1f71210d51eb6523bea3"
@@ -6812,6 +7226,11 @@ prelude-ls@~1.1.2:
   resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.1.2.tgz#21932a549f5e52ffd9a827f570e04be62a97da54"
   integrity sha1-IZMqVJ9eUv/ZqCf1cOBL5iqX2lQ=
 
+prettier@^1.18.2:
+  version "1.18.2"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.18.2.tgz#6823e7c5900017b4bd3acf46fe9ac4b4d7bda9ea"
+  integrity sha512-OeHeMc0JhFE9idD4ZdtNibzY0+TPHSpSSb9h8FqtP+YnoZZ1sl8Vc9b1sasjfymH3SonAF4QcA2+mzHPhMvIiw==
+
 pretty-bytes@^1.0.2:
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/pretty-bytes/-/pretty-bytes-1.0.4.tgz#0a22e8210609ad35542f8c8d5d2159aff0751c84"
@@ -7109,6 +7528,14 @@ read-pkg-up@^1.0.1:
     find-up "^1.0.0"
     read-pkg "^1.0.0"
 
+read-pkg-up@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/read-pkg-up/-/read-pkg-up-2.0.0.tgz#6b72a8048984e0c41e79510fd5e9fa99b3b549be"
+  integrity sha1-a3KoBImE4MQeeVEP1en6mbO1Sb4=
+  dependencies:
+    find-up "^2.0.0"
+    read-pkg "^2.0.0"
+
 read-pkg-up@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/read-pkg-up/-/read-pkg-up-3.0.0.tgz#3ed496685dba0f8fe118d0691dc51f4a1ff96f07"
@@ -7134,6 +7561,15 @@ read-pkg@^1.0.0:
     normalize-package-data "^2.3.2"
     path-type "^1.0.0"
 
+read-pkg@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/read-pkg/-/read-pkg-2.0.0.tgz#8ef1c0623c6a6db0dc6713c4bfac46332b2368f8"
+  integrity sha1-jvHAYjxqbbDcZxPEv6xGMysjaPg=
+  dependencies:
+    load-json-file "^2.0.0"
+    normalize-package-data "^2.3.2"
+    path-type "^2.0.0"
+
 read-pkg@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/read-pkg/-/read-pkg-3.0.0.tgz#9cbc686978fee65d16c00e2b19c237fcf6e38389"
@@ -7261,6 +7697,11 @@ regex-not@^1.0.0, regex-not@^1.0.2:
     extend-shallow "^3.0.2"
     safe-regex "^1.1.0"
 
+regexpp@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/regexpp/-/regexpp-2.0.1.tgz#8d19d31cf632482b589049f8281f93dbcba4d07f"
+  integrity sha512-lv0M6+TkDVniA3aD1Eg0DVpfU/booSu7Eev3TDO/mZKHBfVjgCGTV4t4buppESEYDtkArYFOxTJWv6S5C+iaNw==
+
 remove-bom-buffer@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/remove-bom-buffer/-/remove-bom-buffer-3.0.0.tgz#c2bf1e377520d324f623892e33c10cac2c252b53"
@@ -7420,6 +7861,13 @@ resolve@1.x, resolve@^1.1.6, resolve@^1.1.7, resolve@^1.10.0, resolve@^1.3.2, re
   dependencies:
     path-parse "^1.0.6"
 
+resolve@^1.10.1, resolve@^1.11.0, resolve@^1.5.0:
+  version "1.12.0"
+  resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.12.0.tgz#3fc644a35c84a48554609ff26ec52b66fa577df6"
+  integrity sha512-B/dOmuoAik5bKcD6s6nXDCjzUKnaDvdkRyAk6rsmsKLipWj4797iothd7jmmUhWTfinVMU+wc56rYKsit2Qy4w==
+  dependencies:
+    path-parse "^1.0.6"
+
 restore-cursor@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/restore-cursor/-/restore-cursor-2.0.0.tgz#9f7ee287f82fd326d4fd162923d62129eee0dfaf"
@@ -7443,7 +7891,7 @@ retry@^0.10.0:
   resolved "https://registry.yarnpkg.com/retry/-/retry-0.10.1.tgz#e76388d217992c252750241d3d3956fed98d8ff4"
   integrity sha1-52OI0heZLCUnUCQdPTlW/tmNj/Q=
 
-rimraf@2, rimraf@^2.5.4, rimraf@^2.6.1, rimraf@^2.6.2, rimraf@^2.6.3:
+rimraf@2, rimraf@2.6.3, rimraf@^2.5.4, rimraf@^2.6.1, rimraf@^2.6.2, rimraf@^2.6.3:
   version "2.6.3"
   resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.6.3.tgz#b2d104fe0d8fb27cf9e0a1cda8262dd3833c6cab"
   integrity sha512-mwqeW5XsA2qAejG46gYdENaxXjx9onRNCfn7L0duuP4hCuTIi/QO7PDK07KJfp1d+izWPrzEJDcSqBa0OZQriA==
@@ -7577,11 +8025,21 @@ semver-greatest-satisfied-range@^1.1.0:
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.7.0.tgz#790a7cf6fea5459bac96110b29b60412dc8ff96b"
   integrity sha512-Ya52jSX2u7QKghxeoFGpLwCtGlt7j0oY9DYb5apt9nPlJ42ID+ulTXESnt/qAQcoSERyZ5sl3LDIOw0nAn/5DA==
 
+semver@5.5.0:
+  version "5.5.0"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-5.5.0.tgz#dc4bbc7a6ca9d916dee5d43516f0092b58f7b8ab"
+  integrity sha512-4SJ3dm0WAwWy/NVeioZh5AntkdJoWKxHxcmyP622fOkgHa4z3R0TdBJICINyaSDE6uNwVc8gZr+ZinwZAH4xIA==
+
 semver@^6.0.0, semver@^6.2.0:
   version "6.2.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-6.2.0.tgz#4d813d9590aaf8a9192693d6c85b9344de5901db"
   integrity sha512-jdFC1VdUGT/2Scgbimf7FSx9iJLXoqfglSF+gJeuNWVpiE37OIbc1jywR/GJyFdz3mnkz2/id0L0J/cr0izR5A==
 
+semver@^6.1.0, semver@^6.1.2, semver@^6.3.0:
+  version "6.3.0"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.0.tgz#ee0a64c8af5e8ceea67687b133761e1becbd1d3d"
+  integrity sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==
+
 semver@~5.3.0:
   version "5.3.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.3.0.tgz#9b2ce5d3de02d17c6012ad326aa6b4d0cf54f94f"
@@ -7683,6 +8141,15 @@ slash@^2.0.0:
   resolved "https://registry.yarnpkg.com/slash/-/slash-2.0.0.tgz#de552851a1759df3a8f206535442f5ec4ddeab44"
   integrity sha512-ZYKh3Wh2z1PpEXWr0MpSBZ0V6mZHAQfYevttO11c51CaWjGTaadiKZ+wVt1PbMlDV5qhMFslpZCemhwOK7C89A==
 
+slice-ansi@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/slice-ansi/-/slice-ansi-2.1.0.tgz#cacd7693461a637a5788d92a7dd4fba068e81636"
+  integrity sha512-Qu+VC3EwYLldKa1fCxuuvULvSJOKEgk9pi8dZeCVK7TqBfUNTH4sFkk4joj8afVSfAYgJoSOetjx9QWOJ5mYoQ==
+  dependencies:
+    ansi-styles "^3.2.0"
+    astral-regex "^1.0.0"
+    is-fullwidth-code-point "^2.0.0"
+
 slide@^1.1.6:
   version "1.1.6"
   resolved "https://registry.yarnpkg.com/slide/-/slide-1.1.6.tgz#56eb027d65b4d2dce6cb2e2d32c4d4afc9e1d707"
@@ -7959,6 +8426,15 @@ string-width@^1.0.1, string-width@^1.0.2:
     is-fullwidth-code-point "^2.0.0"
     strip-ansi "^4.0.0"
 
+string-width@^3.0.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/string-width/-/string-width-3.1.0.tgz#22767be21b62af1081574306f69ac51b62203961"
+  integrity sha512-vafcv6KjVZKSgz06oM/H6GDBrAtz8vdhQakGjFIvNrHA6y3HCF1CInLy+QLq8dTJPQ1b+KDUqDFctkdRW44e1w==
+  dependencies:
+    emoji-regex "^7.0.1"
+    is-fullwidth-code-point "^2.0.0"
+    strip-ansi "^5.1.0"
+
 string.prototype.trim@^1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/string.prototype.trim/-/string.prototype.trim-1.1.2.tgz#d04de2c89e137f4d7d206f086b5ed2fae6be8cea"
@@ -7968,6 +8444,22 @@ string.prototype.trim@^1.1.2:
     es-abstract "^1.5.0"
     function-bind "^1.0.2"
 
+string.prototype.trimleft@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/string.prototype.trimleft/-/string.prototype.trimleft-2.1.0.tgz#6cc47f0d7eb8d62b0f3701611715a3954591d634"
+  integrity sha512-FJ6b7EgdKxxbDxc79cOlok6Afd++TTs5szo+zJTUyow3ycrRfJVE2pq3vcN53XexvKZu/DJMDfeI/qMiZTrjTw==
+  dependencies:
+    define-properties "^1.1.3"
+    function-bind "^1.1.1"
+
+string.prototype.trimright@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/string.prototype.trimright/-/string.prototype.trimright-2.1.0.tgz#669d164be9df9b6f7559fa8e89945b168a5a6c58"
+  integrity sha512-fXZTSV55dNBwv16uw+hh5jkghxSnc5oHq+5K/gXgizHwAvMetdAJlHqqoFC1FSDVPYWLkAKl2cxpUT41sV7nSg==
+  dependencies:
+    define-properties "^1.1.3"
+    function-bind "^1.1.1"
+
 string_decoder@^1.1.1:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-1.2.0.tgz#fe86e738b19544afe70469243b2a1ee9240eae8d"
@@ -8001,7 +8493,7 @@ strip-ansi@^4.0.0:
   dependencies:
     ansi-regex "^3.0.0"
 
-strip-ansi@^5.0.0, strip-ansi@^5.1.0:
+strip-ansi@^5.0.0, strip-ansi@^5.1.0, strip-ansi@^5.2.0:
   version "5.2.0"
   resolved "https://registry.yarnpkg.com/strip-ansi/-/strip-ansi-5.2.0.tgz#8c9a536feb6afc962bdfa5b104a5091c1ad9c0ae"
   integrity sha512-DuRs1gKbBqsMKIZlrffwlug8MHkcnpjs5VPmL1PAh+mA30U0DTotfDZ0d2UUsXpPmPmMMJ6W773MaA3J+lbiWA==
@@ -8037,6 +8529,11 @@ strip-indent@^2.0.0:
   resolved "https://registry.yarnpkg.com/strip-indent/-/strip-indent-2.0.0.tgz#5ef8db295d01e6ed6cbf7aab96998d7822527b68"
   integrity sha1-XvjbKV0B5u1sv3qrlpmNeCJSe2g=
 
+strip-json-comments@^3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/strip-json-comments/-/strip-json-comments-3.0.1.tgz#85713975a91fb87bf1b305cca77395e40d2a64a7"
+  integrity sha512-VTyMAUfdm047mwKl+u79WIdrZxtFtn+nBxHeb844XBQ9uMNTuTHdx2hc5RiAJYqwTj3wc/xe5HLSdJSkJ+WfZw==
+
 strip-json-comments@~2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/strip-json-comments/-/strip-json-comments-2.0.1.tgz#3c531942e908c2697c0ec344858c286c7ca0a60a"
@@ -8097,6 +8594,16 @@ symbol-tree@^3.2.2:
   resolved "https://registry.yarnpkg.com/symbol-tree/-/symbol-tree-3.2.4.tgz#430637d248ba77e078883951fb9aa0eed7c63fa2"
   integrity sha512-9QNk5KwDF+Bvz+PyObkmSYjI5ksVUYtjW7AU22r2NKcfLJcXp96hkDWU3+XndOsUb+AQ9QhfzfCT2O+CNWT5Tw==
 
+table@^5.2.3:
+  version "5.4.6"
+  resolved "https://registry.yarnpkg.com/table/-/table-5.4.6.tgz#1292d19500ce3f86053b05f0e8e7e4a3bb21079e"
+  integrity sha512-wmEc8m4fjnob4gt5riFRtTu/6+4rSe12TpAELNSqHMfF3IqnA+CH37USM6/YR3qRZv7e56kAEAtd6nKZaxe0Ug==
+  dependencies:
+    ajv "^6.10.2"
+    lodash "^4.17.14"
+    slice-ansi "^2.1.0"
+    string-width "^3.0.0"
+
 tar@^4, tar@^4.4.10, tar@^4.4.8:
   version "4.4.10"
   resolved "https://registry.yarnpkg.com/tar/-/tar-4.4.10.tgz#946b2810b9a5e0b26140cf78bea6b0b0d689eba1"
@@ -8147,6 +8654,11 @@ text-extensions@^2.0.0:
   resolved "https://registry.yarnpkg.com/text-extensions/-/text-extensions-2.0.0.tgz#43eabd1b495482fae4a2bf65e5f56c29f69220f6"
   integrity sha512-F91ZqLgvi1E0PdvmxMgp+gcf6q8fMH7mhdwWfzXnl1k+GbpQDmi8l7DzLC5JTASKbwpY3TfxajAUzAXcv2NmsQ==
 
+text-table@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/text-table/-/text-table-0.2.0.tgz#7f5ee823ae805207c00af2df4a84ec3fcfa570b4"
+  integrity sha1-f17oI66AUgfACvLfSoTsP8+lcLQ=
+
 thenify-all@^1.0.0:
   version "1.6.0"
   resolved "https://registry.yarnpkg.com/thenify-all/-/thenify-all-1.6.0.tgz#1a1918d402d8fc3f98fbf234db0bcc8cc10e9726"
@@ -8346,84 +8858,26 @@ ts-node@^8.0.1:
     source-map-support "^0.5.6"
     yn "^3.0.0"
 
-tslib@1.9.0:
-  version "1.9.0"
-  resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.9.0.tgz#e37a86fda8cbbaf23a057f473c9f4dc64e5fc2e8"
-  integrity sha512-f/qGG2tUkrISBlQZEjEqoZ3B2+npJjIf04H1wuAv9iA8i04Icp+61KRXxFdha22670NJopsZCIjhC3SnjPRKrQ==
+tsconfig-paths@^3.6.0:
+  version "3.8.0"
+  resolved "https://registry.yarnpkg.com/tsconfig-paths/-/tsconfig-paths-3.8.0.tgz#4e34202d5b41958f269cf56b01ed95b853d59f72"
+  integrity sha512-zZEYFo4sjORK8W58ENkRn9s+HmQFkkwydDG7My5s/fnfr2YYCaiyXe/HBUcIgU8epEKOXwiahOO+KZYjiXlWyQ==
+  dependencies:
+    "@types/json5" "^0.0.29"
+    deepmerge "^2.0.1"
+    json5 "^1.0.1"
+    minimist "^1.2.0"
+    strip-bom "^3.0.0"
 
-tslib@^1.0.0, tslib@^1.8.0, tslib@^1.8.1, tslib@^1.9.0:
+tslib@^1.8.1, tslib@^1.9.0:
   version "1.10.0"
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.10.0.tgz#c3c19f95973fb0a62973fb09d90d961ee43e5c8a"
   integrity sha512-qOebF53frne81cf0S9B41ByenJ3/IuH8yJKngAX35CmiZySA0khhkovshKK+jGCaMnVomla7gVlIcc3EvKPbTQ==
 
-tslint-config-semistandard@^7.0.0:
-  version "7.0.0"
-  resolved "https://registry.yarnpkg.com/tslint-config-semistandard/-/tslint-config-semistandard-7.0.0.tgz#c2d3214b6282a4fed07e875dd9f0691be4e832f1"
-  integrity sha512-SMZmVMbHYn6sykthhoNSK39Oxt7b3LdkuXycAxsagp+W7rCBWYowbpwYOJQmeT2a8Vjh6Tz2ifHyraWKB5uArw==
-  dependencies:
-    tslint-config-standard "^7.0.0"
-    tslint-eslint-rules "^4.1.1"
-
-tslint-config-standard@^7.0.0:
-  version "7.1.0"
-  resolved "https://registry.yarnpkg.com/tslint-config-standard/-/tslint-config-standard-7.1.0.tgz#6bcc435a179478e365f6cc62312a561221985760"
-  integrity sha512-cETzxZcEQ1RKjwtEScGryAtqwiRFc55xBxhZP6bePyOfXmo6i1/QKQrTgFKBiM4FjCvcqTjJq20/KGrh+TzTfQ==
-  dependencies:
-    tslint-eslint-rules "^5.3.1"
-
-tslint-eslint-rules@^4.1.1:
-  version "4.1.1"
-  resolved "https://registry.yarnpkg.com/tslint-eslint-rules/-/tslint-eslint-rules-4.1.1.tgz#7c30e7882f26bc276bff91d2384975c69daf88ba"
-  integrity sha1-fDDniC8mvCdr/5HSOEl1xp2viLo=
-  dependencies:
-    doctrine "^0.7.2"
-    tslib "^1.0.0"
-    tsutils "^1.4.0"
-
-tslint-eslint-rules@^5.3.1:
-  version "5.4.0"
-  resolved "https://registry.yarnpkg.com/tslint-eslint-rules/-/tslint-eslint-rules-5.4.0.tgz#e488cc9181bf193fe5cd7bfca213a7695f1737b5"
-  integrity sha512-WlSXE+J2vY/VPgIcqQuijMQiel+UtmXS+4nvK4ZzlDiqBfXse8FAvkNnTcYhnQyOTW5KFM+uRRGXxYhFpuBc6w==
-  dependencies:
-    doctrine "0.7.2"
-    tslib "1.9.0"
-    tsutils "^3.0.0"
-
-tslint@^5.10.0:
-  version "5.18.0"
-  resolved "https://registry.yarnpkg.com/tslint/-/tslint-5.18.0.tgz#f61a6ddcf372344ac5e41708095bbf043a147ac6"
-  integrity sha512-Q3kXkuDEijQ37nXZZLKErssQVnwCV/+23gFEMROi8IlbaBG6tXqLPQJ5Wjcyt/yHPKBC+hD5SzuGaMora+ZS6w==
-  dependencies:
-    "@babel/code-frame" "^7.0.0"
-    builtin-modules "^1.1.1"
-    chalk "^2.3.0"
-    commander "^2.12.1"
-    diff "^3.2.0"
-    glob "^7.1.1"
-    js-yaml "^3.13.1"
-    minimatch "^3.0.4"
-    mkdirp "^0.5.1"
-    resolve "^1.3.2"
-    semver "^5.3.0"
-    tslib "^1.8.0"
-    tsutils "^2.29.0"
-
-tsutils@^1.4.0:
-  version "1.9.1"
-  resolved "https://registry.yarnpkg.com/tsutils/-/tsutils-1.9.1.tgz#b9f9ab44e55af9681831d5f28d0aeeaf5c750cb0"
-  integrity sha1-ufmrROVa+WgYMdXyjQrur1x1DLA=
-
-tsutils@^2.29.0:
-  version "2.29.0"
-  resolved "https://registry.yarnpkg.com/tsutils/-/tsutils-2.29.0.tgz#32b488501467acbedd4b85498673a0812aca0b99"
-  integrity sha512-g5JVHCIJwzfISaXpXE1qvNalca5Jwob6FjI4AoPlqMusJ6ftFE7IkkFoMhVLRgK+4Kx3gkzb8UZK5t5yTTvEmA==
-  dependencies:
-    tslib "^1.8.1"
-
-tsutils@^3.0.0:
-  version "3.14.0"
-  resolved "https://registry.yarnpkg.com/tsutils/-/tsutils-3.14.0.tgz#bf8d5a7bae5369331fa0f2b0a5a10bd7f7396c77"
-  integrity sha512-SmzGbB0l+8I0QwsPgjooFRaRvHLBLNYM8SeQ0k6rtNDru5sCGeLJcZdwilNndN+GysuFjF5EIYgN8GfFG6UeUw==
+tsutils@^3.17.1:
+  version "3.17.1"
+  resolved "https://registry.yarnpkg.com/tsutils/-/tsutils-3.17.1.tgz#ed719917f11ca0dee586272b2ac49e015a2dd759"
+  integrity sha512-kzeQ5B8H3w60nFY2g8cJIuH7JDpsALXySGtwGJ0p2LSjLgay3NdIpqq5SoOBe46bKDW2iq25irHCr8wjomUS2g==
   dependencies:
     tslib "^1.8.1"
 
@@ -8716,6 +9170,11 @@ uuid@^3.0.1, uuid@^3.3.2:
   resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.3.2.tgz#1b4af4955eb3077c501c23872fc6513811587131"
   integrity sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA==
 
+v8-compile-cache@^2.0.3:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/v8-compile-cache/-/v8-compile-cache-2.1.0.tgz#e14de37b31a6d194f5690d67efc4e7f6fc6ab30e"
+  integrity sha512-usZBT3PW+LOjM25wbqIlZwPeJV+3OSz3M1k1Ws8snlW39dZyYL9lOGC5FgPVHfk0jKmjiDV8Z0mIbVQPiwFs7g==
+
 v8flags@^3.0.1:
   version "3.1.3"
   resolved "https://registry.yarnpkg.com/v8flags/-/v8flags-3.1.3.tgz#fc9dc23521ca20c5433f81cc4eb9b3033bb105d8"
@@ -8800,6 +9259,31 @@ vinyl@^2.0.0:
     remove-trailing-separator "^1.0.1"
     replace-ext "^1.0.0"
 
+vscode-json-languageservice@^3.2.1:
+  version "3.3.3"
+  resolved "https://registry.yarnpkg.com/vscode-json-languageservice/-/vscode-json-languageservice-3.3.3.tgz#f7e512a2cd5e82fecbebf507d6fceaea47661297"
+  integrity sha512-5vL3OXTUuQpn6+tGd47dopio+7WwbtIZ07zfYMzAUX8eVWPZjfEsLeSWmQk5Xw+vwgu+j5zC4koz5UofLDGGRA==
+  dependencies:
+    jsonc-parser "^2.1.1"
+    vscode-languageserver-types "^3.15.0-next.2"
+    vscode-nls "^4.1.1"
+    vscode-uri "^2.0.3"
+
+vscode-languageserver-types@^3.15.0-next.2:
+  version "3.15.0-next.4"
+  resolved "https://registry.yarnpkg.com/vscode-languageserver-types/-/vscode-languageserver-types-3.15.0-next.4.tgz#9aae49844ef826ae656382facecc20664113c060"
+  integrity sha512-IKIWTdUPBnOtwznIrhxKnjVZ7hYxEzwZ3M2xmDi7OjjexuOM6LnGtoo1Dv4wYSik4epK4STEib6e8da2GxUsJA==
+
+vscode-nls@^4.1.1:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/vscode-nls/-/vscode-nls-4.1.1.tgz#f9916b64e4947b20322defb1e676a495861f133c"
+  integrity sha512-4R+2UoUUU/LdnMnFjePxfLqNhBS8lrAFyX7pjb2ud/lqDkrUavFUTcG7wR0HBZFakae0Q6KLBFjMS6W93F403A==
+
+vscode-uri@^2.0.3:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/vscode-uri/-/vscode-uri-2.0.3.tgz#25e5f37f552fbee3cec7e5f80cef8469cefc6543"
+  integrity sha512-4D3DI3F4uRy09WNtDGD93H9q034OHImxiIcSq664Hq1Y1AScehlP3qqZyTkX/RWxeu0MRMHGkrxYqm2qlDF/aw==
+
 w3c-hr-time@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/w3c-hr-time/-/w3c-hr-time-1.0.1.tgz#82ac2bff63d950ea9e3189a58a65625fedf19045"
@@ -8985,6 +9469,13 @@ write-pkg@^3.1.0:
     sort-keys "^2.0.0"
     write-json-file "^2.2.0"
 
+write@1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/write/-/write-1.0.3.tgz#0800e14523b923a387e415123c865616aae0f5c3"
+  integrity sha512-/lg70HAjtkUgWPVZhZcm+T4hkL8Zbtp1nFNOn3lRrxnlv50SRBv7cR7RqR+GMsd3hUXy9hWBo4CHTbFTcOYwig==
+  dependencies:
+    mkdirp "^0.5.1"
+
 ws@^5.2.0:
   version "5.2.2"
   resolved "https://registry.yarnpkg.com/ws/-/ws-5.2.2.tgz#dffef14866b8e8dc9133582514d1befaf96e980f"