node_modules/react-native-navbar/index.js: Unexpected token (98:19)

I downloaded a demo.(http://startreact.com/themes/native-starter/)

After that. Run the App, I got an error:

```
SyntaxError: /xxxxx/node_modules/react-native-navbar/index.js: Unexpected token (98:19)
```

How to fix this?
The Version of Packgers are:

```
flux: 2.1.1
react-native: 0.13.2
react-native-drawer: 1.6.0
react-native-navbar: 1.0.3
react-native-responsive-image: 1.0.0
```

Start by reproducing the error with the linked native-starter demo and the listed package versions. Inspect node_modules/react-native-navbar/index.js around line 98 to identify the unsupported syntax, then verify the app runs without the reported parser error.

Written by the indexing model from the issue text.