chore: support ESLint v5 (#144)

Resolves #138

BREAKING CHANGE: dropping support for Node 4 requires a major version
bump.

Author: macklinu

Diff for: .eslintrc.json

@@ -15,11 +15,13 @@
   ],
   "rules": {
     "no-var": "error",
+    "object-shorthand": "error",
+    "prefer-arrow-callback": "error",
     "prefer-const": "error",
     "strict": ["error", "global"],
     "eslint-plugin/prefer-placeholders": "error",
     "eslint-plugin/test-case-shorthand-strings": "error",
-    "node/no-unsupported-features": ["error", { "version": 4 }],
+    "node/no-unsupported-features": ["error", { "version": 6 }],
     "prettier/prettier": "error"
   }
 }

Diff for: .travis.yml

@@ -1,8 +1,8 @@
 language: node_js
 node_js:
-  - 4
   - 6
   - 8
+  - 10
 cache:
   directories:
     - '$HOME/.npm'

Diff for: CHANGELOG.md

@@ -1,3 +1,13 @@
+## 4.0.0
+
+- Added fixer for `promise/no-new-statics` rule
+  ([#133](https://github.com/xjamundx/eslint-plugin-promise/pull/133))
+- Support ESLint v5
+  ([#144](https://github.com/xjamundx/eslint-plugin-promise/pull/144))
+
+This is a breaking change that drops support for Node v4. In order to use ESLint
+v5 and eslint-plugin-promise v4, you must use Node >=6.
+
 ## 3.8.0
 
 - Removed `promise/avoid-new` from recommended configuration

Diff for: README.md

@@ -7,7 +7,6 @@ Enforce best practices for JavaScript promises.
 [![code style: prettier](https://img.shields.io/badge/code_style-prettier-ff69b4.svg)](https://github.com/prettier/prettier)
 
 <!-- START doctoc generated TOC please keep comment here to allow auto update -->
-
 <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
 
 - [Installation](#installation)
@@ -37,8 +36,8 @@ also install `eslint-plugin-promise` globally.
 
 ## Usage
 
-Add `promise` to the plugins section of your `.eslintrc` configuration file. You
-can omit the `eslint-plugin-` prefix:
+Add `promise` to the plugins section of your `.eslintrc.json` configuration
+file. You can omit the `eslint-plugin-` prefix:
 
 ```json
 {
@@ -67,7 +66,7 @@ Then configure the rules you want to use under the rules section.
 }
 ```
 
-or start with the recommended rule set
+or start with the recommended rule set:
 
 ```json
 {