Add babel-loader for node_modules/@novnc

The noVNC npm package dist is ES6, it needs to be babelized
for the storybook.

Author: mareklibra

package.json

@@ -49,6 +49,7 @@
     "babel-core": "^6.26.0",
     "babel-eslint": "^8.2.2",
     "babel-jest": "^22.4.3",
+    "babel-loader": "^7.1.4",
     "babel-plugin-transform-class-properties": "^6.24.1",
     "babel-plugin-transform-export-extensions": "^6.22.0",
     "babel-plugin-transform-object-assign": "^6.22.0",

storybook/webpack.config.js

@@ -80,6 +80,10 @@ module.exports = {
           mimetype: 'image/svg+xml',
           name: '[name].[ext]'
         }
+      },
+      {
+        test: /node_modules\/@novnc/,
+        loader: 'babel-loader'
       }
     ]
   }