build-demo fail

[AllenFang]

HI @alexkuz, when I run npm run build-demo, I got the following error:

ERROR in ./demo/src/App.jsx
Module build failed: SyntaxError: /home/user1/Node/react-dock/demo/src/App.jsx: Decorators are not supported yet in 6.x pending proposal update.
  42 | 
  43 | @radium
> 44 | export default class App extends Component {
     |                ^
  45 |   constructor(props) {
  46 |     super(props);
  47 |     this.state = {
    at File.buildCodeFrameError (/home/user1/Node/react-dock/node_modules/babel-core/lib/transformation/file/index.js:467:15)
    at NodePath.buildCodeFrameError (/home/user1/Node/react-dock/node_modules/babel-core/node_modules/babel-traverse/lib/path/index.js:152:26)
    at doError (/home/user1/Node/react-dock/node_modules/babel-preset-stage-0/node_modules/babel-preset-stage-1/node_modules/babel-plugin-transform-decorators/lib/index.js:139:16)
    at PluginPass.ClassDeclaration (/home/user1/Node/react-dock/node_modules/babel-preset-stage-0/node_modules/babel-preset-stage-1/node_modules/babel-plugin-transform-decorators/lib/index.js:165:9)
    at newFn (/home/user1/Node/react-dock/node_modules/babel-core/node_modules/babel-traverse/lib/visitors.js:310:19)
    at NodePath._call (/home/user1/Node/react-dock/node_modules/babel-core/node_modules/babel-traverse/lib/path/context.js:78:18)
    at NodePath.call (/home/user1/Node/react-dock/node_modules/babel-core/node_modules/babel-traverse/lib/path/context.js:49:17)
    at NodePath.visit (/home/user1/Node/react-dock/node_modules/babel-core/node_modules/babel-traverse/lib/path/context.js:108:12)
    at TraversalContext.visitQueue (/home/user1/Node/react-dock/node_modules/babel-core/node_modules/babel-traverse/lib/context.js:174:16)
    at TraversalContext.visitQueue (/home/user1/Node/react-dock/node_modules/babel-core/node_modules/babel-traverse/lib/context.js:180:21)
    at TraversalContext.visitMultiple (/home/user1/Node/react-dock/node_modules/babel-core/node_modules/babel-traverse/lib/context.js:119:17)
    at TraversalContext.visit (/home/user1/Node/react-dock/node_modules/babel-core/node_modules/babel-traverse/lib/context.js:217:19)
    at Function.traverse.node (/home/user1/Node/react-dock/node_modules/babel-core/node_modules/babel-traverse/lib/index.js:171:17)
    at NodePath.visit (/home/user1/Node/react-dock/node_modules/babel-core/node_modules/babel-traverse/lib/path/context.js:118:43)
    at TraversalContext.visitQueue (/home/user1/Node/react-dock/node_modules/babel-core/node_modules/babel-traverse/lib/context.js:174:16)
    at TraversalContext.visitSingle (/home/user1/Node/react-dock/node_modules/babel-core/node_modules/babel-traverse/lib/context.js:124:19)
    at TraversalContext.visit (/home/user1/Node/react-dock/node_modules/babel-core/node_modules/babel-traverse/lib/context.js:219:19)
    at Function.traverse.node (/home/user1/Node/react-dock/node_modules/babel-core/node_modules/babel-traverse/lib/index.js:171:17)
    at traverse (/home/user1/Node/react-dock/node_modules/babel-core/node_modules/babel-traverse/lib/index.js:90:12)
    at File.transform (/home/user1/Node/react-dock/node_modules/babel-core/lib/transformation/file/index.js:571:59)
    at /home/user1/Node/react-dock/node_modules/babel-core/lib/transformation/pipeline.js:53:19
    at File.wrap (/home/user1/Node/react-dock/node_modules/babel-core/lib/transformation/file/index.js:586:16)
    at Pipeline.transform (/home/user1/Node/react-dock/node_modules/babel-core/lib/transformation/pipeline.js:50:17)
    at transpile (/home/user1/Node/react-dock/node_modules/babel-loader/index.js:14:22)
    at Object.module.exports (/home/user1/Node/react-dock/node_modules/babel-loader/index.js:88:12)
 @ ./demo/src/index.js 7:11-27