update formatting

webpack.config.js

@@ -55,7 +55,7 @@ const moduleRules = [
                 }
             },
             'css-loader',
-            'sass-loader'
+            'sass-loader',
         ],
     },
     // Hide System.import warnings. ref: https://github.com/angular/angular/issues/21560
@@ -99,7 +99,7 @@ const plugins = [
     }),
     new MiniCssExtractPlugin({
         filename: '[name].[hash].css',
-        chunkFilename: '[id].[hash].css'
+        chunkFilename: '[id].[hash].css',
     }),
     new webpack.DefinePlugin({
         'process.env': {