drop node 6 compatability

Author: bradzacher

.travis.yml

@@ -3,7 +3,6 @@ language: node_js
 node_js:
   - '10'
   - '8'
-  - '6'
 install: npm i
 script:
   - npm run check-format

prettier.config.js

@@ -9,6 +9,6 @@ module.exports = {
   semi: true,
   singleQuote: true,
   tabWidth: 2,
-  trailingComma: 'es5',
+  trailingComma: 'all',
   useTabs: false,
 };

tests/baseEslintConfig.js

@@ -1,34 +1,32 @@
-const path = require('path')
+const path = require('path');
 
-module.exports = (dirname) => ({
-    env: {
-        es6: true,
-    },
-    parserOptions: {
-        ecmaVersion: 2018,
-        sourceType: 'module',
-    },
-    plugins: [
-        'import'
+module.exports = dirname => ({
+  env: {
+    es6: true,
+  },
+  parserOptions: {
+    ecmaVersion: 2018,
+    sourceType: 'module',
+  },
+  plugins: ['import'],
+  rules: {
+    'import/no-unresolved': 'error',
+    'import/extensions': [
+      'error',
+      'ignorePackages',
+      {
+        js: 'never',
+        jsx: 'never',
+        ts: 'never',
+        tsx: 'never',
+      },
     ],
-    rules: {
-        'import/no-unresolved': 'error',
-        'import/extensions': [
-            'error',
-            'ignorePackages',
-            {
-                js: 'never',
-                jsx: 'never',
-                ts: 'never',
-                tsx: 'never',
-            },
-        ],
-    },
-    settings: {
-        'import/resolver': {
-            [path.resolve(`${__dirname}/../index.js`)]: {
-                directory: dirname,
-            },
-        },
+  },
+  settings: {
+    'import/resolver': {
+      [path.resolve(`${__dirname}/../index.js`)]: {
+        directory: dirname,
+      },
     },
-})
+  },
+});