Fix renderer build issue

webpack.renderer.config.js

@@ -11,6 +11,7 @@ module.exports = {
         '@babel/plugin-proposal-object-rest-spread'
       ]
     },
+  }),
   target: 'electron-renderer',
   entry: {
     background: './src/renderer/background.js',
@@ -21,5 +22,4 @@ module.exports = {
     path: path.resolve(__dirname, 'dist/renderer'),
     filename: '[name].js'
   }
-  }),
 }