not working with import { syncHistoryWithStore } from 'react-router-redux';

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### Version

| Dependency | Version |
| --- | --- |
| react-router-native | ^2.0.0-alpha.2 |
| react-router | 3.0.0-alpha.1 |
| react-native | 0.31.0 |
### Expected Behavior

import { Route, StackRoute, TabsRoute, Router, nativeHistory } from 'react-router-native';
import { syncHistoryWithStore } from 'react-router-redux';
const store = configureStore();
const history = syncHistoryWithStore(nativeHistory, store);

### Actual Behavior

It makes Error ~ Not Callable Module..

Without -- const history = syncHistoryWithStore(nativeHistory, store); --

It is working~~
### Steps to Reproduce