Webpack Loader issue when exporting SVGs
| Reporting a bug or issue
| -------------------------------------------------------------------------------------------------

**Expected behavior:**
- When using the quick start guide, I should be able to see the result in sketch.

**Observed behavior:**
Got this error when running `skpm-build` 
```
error Error while building ./my-command.js
./node_modules/react-sketchapp/lib/module/components/index.js 6:9
Module parse failed: Unexpected token (6:9)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
| export { Image } from './Image';
| export { RedBox } from './RedBox';
> export * as Svg from './Svg';
| export { View } from './View';
| export { Text } from './Text';
 @ ./node_modules/react-sketchapp/lib/module/index.common.js 5:0-29 5:0-29
 @ ./node_modules/react-sketchapp/lib/module/index.sketch.js
 @ ./src/my-command.js
```
**How to reproduce:**
I just followed the install guide. Both the curl command and the cloning the repo.

**Sketch version:**

**Please attach screenshots, a zip file of your project, and/or a link to your github project**
Here is the project I tried running it on, which is just the cloned repo. 

I also tried setting up things manually in my own repo I planned to use it in, and got the same result.
[basic-setup.zip](https://github.com/airbnb/react-sketchapp/files/4602081/basic-setup.zip)
