Unable to start app - RN v0.49.3

[bushev]

Version

Tell us which versions you are using:

• react-native-router-flux v4.0.0-beta.22
• react-native v0.49.3

Expected behaviour

App starts successfully

Actual behaviour

Error:

error: bundling failed: SyntaxError /Users/bushev/IdeaProjects/testProj/node_modules/react-native-router-flux/src/Router.js: Unexpected token (8:0)
   6 | import { addNavigationHelpers } from 'react-navigation';
   7 | 
>  8 | @observer
     | ^
   9 | class App extends React.Component {
  10 |   static propTypes = {
  11 |     navigator: PropTypes.func,

Steps to reproduce

For non-obvious bugs, please fork this component, modify Example project to reproduce your issue and include link here.

1. Build an app with latest RN.

[bushev]

I added:

to package.json

"babel-preset-react-native-stage-0": "1.0.1"

to .babelrc

"react-native-stage-0/decorator-support"

It helps me.