Remove node 6 trailing comma support

This removes trailing commas from node scripts which previously
omitted them for compatiblity with node 6

.prettierrc

 {
   "printWidth": 100,
   "singleQuote": true,
-  "trailingComma": "es5",
-  "overrides": [
-    {
-      "files": ["**/app/**/*", "**/spec/**/*"],
-      "options": {
   "trailingComma": "all"
-      }
-    }
-  ]
 }

config/karma.config.js

@@ -26,7 +26,7 @@ webpackConfig.devtool = 'cheap-inline-source-map';
 webpackConfig.plugins.push(
   new webpack.DefinePlugin({
     'process.env.BABEL_ENV': JSON.stringify(process.env.BABEL_ENV || process.env.NODE_ENV || null),
-  })
+  }),
 );
 
 const specFilters = argumentsParser
@@ -37,7 +37,7 @@ const specFilters = argumentsParser
       memo.push(filter, filter.replace(/\/?$/, '/**/*.js'));
       return memo;
     },
-    []
+    [],
   )
   .parse(process.argv).filterSpec;
 
@@ -51,7 +51,7 @@ if (specFilters.length) {
         root: ROOT_PATH,
         matchBase: true,
       })
-      .filter(path => path.endsWith('spec.js'))
+      .filter(path => path.endsWith('spec.js')),
   );
 
   // flatten
@@ -78,8 +78,8 @@ if (specFilters.length) {
     new webpack.ContextReplacementPlugin(
       /spec[\\\/]javascripts$/,
       path.join(ROOT_PATH, 'spec/javascripts'),
-      newContext
-    )
+      newContext,
+    ),
   );
 }
 

config/webpack.config.js

@@ -251,7 +251,7 @@ module.exports = {
       } else {
         resource.request = path.join(
           ROOT_PATH,
-          'app/assets/javascripts/vue_shared/components/empty_component.js'
+          'app/assets/javascripts/vue_shared/components/empty_component.js',
         );
       }
     }),
@@ -267,7 +267,7 @@ module.exports = {
           const missingDeps = Array.from(compilation.missingDependencies);
           const nodeModulesPath = path.join(ROOT_PATH, 'node_modules');
           const hasMissingNodeModules = missingDeps.some(
-            file => file.indexOf(nodeModulesPath) !== -1
+            file => file.indexOf(nodeModulesPath) !== -1,
           );
 
           // watch for changes to missing node_modules
@@ -278,7 +278,7 @@ module.exports = {
 
           // report our auto-generated bundle count
           console.log(
-            `${autoEntriesCount} entries from '/pages' automatically added to webpack output.`
+            `${autoEntriesCount} entries from '/pages' automatically added to webpack output.`,
           );
 
           callback();

scripts/frontend/postinstall.js

@@ -13,7 +13,7 @@ if (process.platform === 'darwin') {
         ensure that it is supported by the fsevents library.
 
         You can try installing again with \`${chalk.cyan('yarn install --force')}\`
-      `)
+      `),
     );
     process.exit(1);
   }

scripts/frontend/prettier.js

@@ -32,7 +32,7 @@ let globDir = process.argv[3] || '';
 if (globDir && globDir.charAt(globDir.length - 1) !== '/') globDir += '/';
 
 console.log(
-  `Loading all ${allFiles ? '' : 'staged '}files ${globDir ? `within ${globDir} ` : ''}...`
+  `Loading all ${allFiles ? '' : 'staged '}files ${globDir ? `within ${globDir} ` : ''}...`,
 );
 
 const globPatterns = matchExtensions.map(ext => `${globDir}**/*.${ext}`);
@@ -105,7 +105,7 @@ Promise.all(matchedFiles.map(checkFileWithPrettierConfig))
   .then(() => {
     const failAction = shouldSave ? 'fixed' : 'failed';
     console.log(
-      `\nSummary:\n  ${matchedCount} files processed (${passedCount} passed, ${failedCount} ${failAction}, ${ignoredCount} ignored)\n`
+      `\nSummary:\n  ${matchedCount} files processed (${passedCount} passed, ${failedCount} ${failAction}, ${ignoredCount} ignored)\n`,
     );
 
     if (didWarn) process.exit(1);