Cannot resolve fs in several packages
When running this i get the following errors... http://th3fallen.d.pr/Nh5v.jpg

with the following config 

```
module.exports = {
  files: [
    'assets/icons/*.svg', // glob style
  ],
  fontName: 'wiw-icons',
  classPrefix: 'wiwi-',
  baseClass: 'wiwi',
  fixedWidth: true,
  types: ['eot', 'woff', 'ttf', 'svg'], // this is the default
};
```

am i just missing a step or something