Nothing is rendered
I am  reporting an issue.

I used this the Example Code from the API at 
Artboard. I used the example and added a new folder in the examples folders. 
Unfortunately it doesn't render a thing :(

Code:

```
import React from 'react';
import { render, Artboard } from 'react-sketchapp';


const Document = props =>
<Artboard
  name='My Artboard'
  style={{
    width: 480
  }}
>
  <Text>Hello world!</Text>
</Artboard>

export default (context) => {
  render(<Document />, context.document.currentPage());
}
```


Sketch version:
43.1
A Screenshot:
![screen shot 2017-05-02 at 13 42 00](https://cloud.githubusercontent.com/assets/26592218/25616460/25860b3a-2f3d-11e7-9eae-ad5ac9d4076b.png)
![screen shot 2017-05-02 at 13 51 05](https://cloud.githubusercontent.com/assets/26592218/25616677/7a86e5b8-2f3e-11e7-91ba-8823d1a8f308.png)
