fix js linter issue

Author: justin808

client/webpack.common.config.js

@@ -21,8 +21,9 @@ module.exports = {
  },
  module: {
  loaders: [
+
  // React is necessary for the client rendering:
- {test: require.resolve('react'), loader: 'expose?React'}
+ {test: require.resolve('react'), loader: 'expose?React'},
  ],
  },
 };