Fix/eslint formatting (#38)

* Fixes multiple eslint formatting errors

* Fixes strict equality comparison to enforce number type

* Adds harmony flag to node start script to enable ES2017 support

* Changing minimum node from 6 to 7

Author: mcrosby114

.eslintrc.json

@@ -13,6 +13,46 @@
       "imports": "always-multiline",
       "exports": "always-multiline",
       "functions": "never"
+    }],
+    "no-underscore-dangle": ["error", {
+      "allow": [
+        "_checkExpiry",
+        "_urlencodedContentType",
+        "_jsonContentType",
+        "_contentType"
+      ]
+    }],
+    "camelcase": ["error", {
+      "allow": [
+        "access_secret",
+        "access_token",
+        "client_id",
+        "client_secret",
+        "error_description",
+        "expires_in",
+        "grant_type",
+        "id_token",
+        "Intuit_name",
+        "intuit_tid",
+        "jwks_uri",
+        "migrate_production",
+        "migrate_sandbox",
+        "oauth_consumer_key",
+        "oauth_consumer_secret",
+        "oauth_nonce",
+        "oauth_signature",
+        "oauth_timestamp",
+        "oauth_token",
+        "oauth_version",
+        "redirect_uri",
+        "refresh_token",
+        "response_type",
+        "token_parts",
+        "token_type",
+        "user_agent",
+        "userinfo_endpoint_production",
+        "userinfo_endpoint_sandbox"
+      ]
     }]
   }
 }

.travis.yml

@@ -4,7 +4,6 @@ node_js:
   - 9
   - 8
   - 7
-  - 6
 
 before_script:
   - npm install

README.md

@@ -11,30 +11,40 @@ The OAuth2 Nodejs Client library is meant to work with Intuit's [OAuth2.0](https
 
 ## Table of Contents
 
+- [Intuit OAuth2.0 NodeJS Library](#intuit-oauth20-nodejs-library)
+  - [Table of Contents](#table-of-contents)
 - [Requirements](#requirements)
 - [Installation](#installation)
   - [Using NodeJS](#using-nodejs)
+    - [Options :](#options)
 - [Usage](#usage)
-  - [Authorization Code flow](#authorization-code-flow)
-- [Sample](#sample)  
-- [Helpers](#helpers)  
-  - [Is Access Token valid](#is-accesstoken-valid)
-  - [Refresh Access_Token](#refresh-access_token)
-  - [Refresh Access_Token by passing the refresh_token explicitly](#refresh-access_token_explicitly)
-  - [Revoke Access Token](#revoke-access_token)
-  - [Getter / Setter for Token](#getter-/-setter-for-token )
-  - [Auth Response](#auth-response) 
-  - [Error Logging](#error-logging)
-- [Contributing](#contributing)
-- [Authors](#authors)
-  - [Contributors](#contributors)
-- [Changelog](#changelog)
-- [License](#license)
+  - [Authorization Code Flow](#authorization-code-flow)
+    - [Step 1](#step-1)
+    - [Scopes :](#scopes)
+    - [Step 2](#step-2)
+- [Sample](#sample)
+  - [Helpers](#helpers)
+    - [Is AccessToken Valid](#is-accesstoken-valid)
+    - [Refresh access_token](#refresh-accesstoken)
+    - [Refresh access_token by passing the refresh_token explicitly](#refresh-accesstoken-by-passing-the-refreshtoken-explicitly)
+    - [Revoke access_token](#revoke-accesstoken)
+    - [Getter / Setter for Token](#getter--setter-for-token)
+      - [Retrieve the Token :](#retrieve-the-token)
+      - [Set the Token :](#set-the-token)
+    - [Migrate OAuth1.0 Tokens to OAuth2.0](#migrate-oauth10-tokens-to-oauth20)
+    - [Validate ID Token](#validate-id-token)
+    - [Auth-Response](#auth-response)
+    - [Error Logging](#error-logging)
+  - [FAQ](#faq)
+  - [Contributing](#contributing)
+    - [Steps](#steps)
+  - [Changelog](#changelog)
+  - [License](#license)
 
 
 # Requirements
 
-The Node.js client library is tested against the `Node`  >= `6.0.0`
+The Node.js client library is tested against the `Node`  >= `7.0.0`
 
 # Installation
 

package.json

@@ -43,7 +43,7 @@
     ]
   },
   "engines": {
-    "node": ">=6.0.0"
+    "node": ">=7.0.0"
   },
   "repository": {
     "type": "git",