feat: update to eslint@5

BREAKING CHANGE: remove object-spread addon, use es9 instead

README.md

@@ -43,7 +43,6 @@ Then enhance it with one or more **addons**:
 - `browser` - If you are going to develop code for the browser (assumes you use CommonJS or AMD)
 - `node` - If you are going to develop code for [NodeJS](nodejs.org)
 - `es6-modules`: If you are going to use ES6 import & export instead of CommonJS or AMD
-- `object-spread`: Allows to use [object rest spread](https://github.com/tc39/proposal-object-rest-spread) when destructuring objects (not necessary if you are using the `es9` base configuration)
 - `babel-parser`: Use [babel-eslint](https://github.com/babel/babel-eslint) parser so that you may use language features that are not yet implemented in eslint (e.g.: dynamic imports)
 - `react` - If you are going to use [React](https://reactjs.org/) (requires `es6` base configuration or higher)
 - `jest` - If you are going to use [Jest](https://facebook.github.io/jest/) to develop tests
@@ -57,35 +56,35 @@ Cutting edge react in the browser:
 {
     "root": true,
     "extends": [
-        "eslint-config-moxy/es8",
+        "eslint-config-moxy/es9",
         "eslint-config-moxy/addons/browser",
         "eslint-config-moxy/addons/es6-modules",
         "eslint-config-moxy/addons/react"
     ]
 }
 ```
 
-ES6 with modules in NodeJS (requires a transpiler such as Babel or similar):
+Cutting edge in NodeJS:
 
 ```json
 {
     "root": true,
     "extends": [
-        "eslint-config-moxy/es6",
-        "eslint-config-moxy/addons/node",
-        "eslint-config-moxy/addons/es6-modules"
+        "eslint-config-moxy/es9",
+        "eslint-config-moxy/addons/node"
     ]
 }
 ```
 
-Use ES6 in NodeJS without any transpiler:
+Cutting edge with modules in NodeJS (requires a transpiler such as Babel or similar):
 
 ```json
 {
     "root": true,
     "extends": [
-        "eslint-config-moxy/es6",
-        "eslint-config-moxy/addons/node"
+        "eslint-config-moxy/es9",
+        "eslint-config-moxy/addons/node",
+        "eslint-config-moxy/addons/es6-modules"
     ]
 }
 ```

addons/babel-parser.js

@@ -5,7 +5,7 @@ module.exports = {
     'plugins': ['babel'],
     'rules': {
         // Require constructor names to begin with a capital letter
-        'babel/new-cap': [2, { 'newIsCap': true }],
+        'babel/new-cap': 2,
         'new-cap': 0,
         // Enforce consistent spacing inside braces
         'babel/object-curly-spacing': [2, 'always'],

es9.js

@@ -8,4 +8,11 @@ module.exports = {
         'ecmaVersion': 2018,
         'sourceType': 'script',
     },
+    'plugins': [
+        'prefer-object-spread',
+    ],
+    'rules': {
+        // Require object spread properties to be used instead of Object.assign()
+        'prefer-object-spread/prefer-object-spread': 2,
+    },
 };