Update dependencies to latest versions (firebase#492)

Author: merlinnot

package.json

@@ -32,37 +32,37 @@
   },
   "dependencies": {
     "@types/cors": "^2.8.5",
-    "@types/express": "^4.11.1",
+    "@types/express": "^4.17.0",
     "@types/jsonwebtoken": "^8.3.2",
-    "@types/lodash": "^4.14.133",
-    "cors": "^2.8.4",
+    "@types/lodash": "^4.14.135",
+    "cors": "^2.8.5",
     "express": "^4.17.1",
-    "jsonwebtoken": "^8.3.2",
-    "lodash": "^4.6.1"
+    "jsonwebtoken": "^8.5.1",
+    "lodash": "^4.17.11"
   },
   "devDependencies": {
     "@types/chai": "^4.1.7",
     "@types/chai-as-promised": "^7.1.0",
     "@types/mocha": "^5.2.7",
     "@types/mock-require": "^2.0.0",
-    "@types/nock": "^10.0.2",
-    "@types/node": "^8.10.49",
-    "@types/sinon": "^7.0.12",
+    "@types/nock": "^10.0.3",
+    "@types/node": "^8.10.50",
+    "@types/sinon": "^7.0.13",
     "chai": "^4.2.0",
     "chai-as-promised": "^7.1.1",
-    "firebase-admin": "^8.0.0",
-    "istanbul": "^0.4.2",
+    "firebase-admin": "^8.2.0",
+    "istanbul": "^0.4.5",
     "mocha": "^6.1.4",
     "mock-require": "^3.0.3",
     "nock": "^10.0.6",
-    "prettier": "^1.17.1",
+    "prettier": "^1.18.2",
     "sinon": "^7.3.2",
-    "ts-node": "^8.2.0",
-    "tslint": "^5.17.0",
+    "ts-node": "^8.3.0",
+    "tslint": "^5.18.0",
     "tslint-config-prettier": "^1.18.0",
     "tslint-no-unused-expression-chai": "^0.1.4",
-    "tslint-plugin-prettier": "^2.0.0",
-    "typescript": "^3.5.1"
+    "tslint-plugin-prettier": "^2.0.1",
+    "typescript": "^3.5.2"
   },
   "peerDependencies": {
     "firebase-admin": "^8.0.0"