feat: extract babel-related rules etc. into a separate config

BREAKING CHANGE: if you use babel with your project, you will need to explicitly include `anvilabs/babel` config together with the base config

Author: yenbekbay

README.md

@@ -49,6 +49,7 @@ Or in combination with the base config (recommended):
 
 Available configs include:
 
+- `"anvilabs/babel"` for usage with [babel transformations](https://github.com/babel/babel-eslint)
 - `"anvilabs/flowtype"` for [Flow](https://flowtype.org/) related rules
 - `"anvilabs/jest"` for [Jest](https://facebook.github.io/jest/) related rules
 - `"anvilabs/lodash"` for [Lodash](https://lodash.com/) related rules

babel.js

@@ -0,0 +1,18 @@
+module.exports = {
+  plugins: ['babel'],
+  parser: 'babel-eslint',
+  rules: {
+    // https://github.com/babel/eslint-plugin-babel
+    'babel/array-bracket-spacing': 'off',
+    'babel/arrow-parens': 'off',
+    'babel/flow-object-type': 'off',
+    'babel/func-params-comma-dangle': 'off',
+    'babel/generator-star-spacing': 'off',
+    'babel/new-cap': 'off',
+    'babel/no-await-in-loop': 'off',
+    'babel/no-invalid-this': 'error',
+    'babel/object-curly-spacing': 'off',
+    'babel/object-shorthand': 'off',
+    'babel/semi': 'off',
+  },
+};

index.js

@@ -7,7 +7,6 @@ Rules.load(path.join(__dirname, 'rules'));
 module.exports = {
   extends: ['airbnb-base', 'prettier'],
   plugins: [
-    'babel',
     'eslint-comments',
     'no-use-extend-native',
     'prettier',
@@ -39,18 +38,6 @@ module.exports = {
         detectObjects: false,
       },
     ],
-    // https://github.com/babel/eslint-plugin-babel
-    'babel/array-bracket-spacing': 'off',
-    'babel/arrow-parens': 'off',
-    'babel/flow-object-type': 'off',
-    'babel/func-params-comma-dangle': 'off',
-    'babel/generator-star-spacing': 'off',
-    'babel/new-cap': 'off',
-    'babel/no-await-in-loop': 'off',
-    'babel/no-invalid-this': 'error',
-    'babel/object-curly-spacing': 'off',
-    'babel/object-shorthand': 'off',
-    'babel/semi': 'off',
     // https://github.com/mysticatea/eslint-plugin-eslint-comments
     'eslint-comments/disable-enable-pair': 'error',
     'eslint-comments/no-duplicate-disable': 'error',

react-base.js

@@ -1,7 +1,6 @@
 module.exports = {
   extends: ['prettier/react'],
   plugins: ['react'],
-  parser: 'babel-eslint',
   parserOptions: {
     ecmaFeatures: {
       jsx: true,