fix: update dependencies (#132)

- BREAKING CHANGE: dropped support for Node 6 and 7

.eslintrc.yml

@@ -6,6 +6,7 @@ env:
 globals:
   Logging: true
 parserOptions:
+  ecmaVersion: 2015
   sourceType: module
 rules:
   indent:

.travis.yml

@@ -1,10 +1,9 @@
 sudo: false
 language: node_js
 node_js:
-  - 6
-  - 7
   - 8
   - 10
+  - 12
 cache: npm
 branches:
   only:

README.md

@@ -5,7 +5,6 @@
 [![Travis][travis-ci-image]][travis-ci-url]
 [![Coveralls][coveralls-image]][coveralls-url]
 
-[![Commitizen friendly][commitizen-image]][commitizen-url]
 [![semantic-release][semantic-release-image]][semantic-release-url]
 [![Greenkeeper badge][greenkeeper-image]][greenkeeper-url]
 

package.json

@@ -30,23 +30,17 @@
   "devDependencies": {
     "chai": "^4.2.0",
     "coveralls": "^3.0.2",
-    "cz-conventional-changelog": "^2.0.0",
-    "eslint": "^5.13.0",
+    "eslint": "^6.0.0",
     "eslint-config-google": "^0.13.0",
-    "eslint-plugin-mocha": "^5.3.0",
-    "husky": "^2.0.0",
+    "eslint-plugin-mocha": "^6.0.0",
+    "husky": "^3.0.0",
     "mocha": "^6.0.0",
     "nps": "^5.9.3",
     "nyc": "^14.0.0",
     "remove-lockfiles": "^2.1.3",
     "semantic-release": "^15.13.3",
     "sinon": "^7.2.3"
   },
-  "config": {
-    "commitizen": {
-      "path": "./node_modules/cz-conventional-changelog"
-    }
-  },
   "husky": {
     "hooks": {
       "pre-commit": "remove-lockfiles"