Opening all webfonts-generator options
Dependencies:
- Laravel Mix: ^1.0
- Webpack: ^3.5.0

Is there a way to pass through this plugin the options that I would normally pass to [webfonts-generator](https://github.com/sunflowerdeath/webfonts-generator)?

I can't reach to all their options like telling to generate the CSS file. My font file is always prepended to my main CSS file and by now I need that file in a separate folder.

Another situation is that my `fileName` option in the `myfont.js` file must be like `public/folder/font.[ext]`, otherwise it puts the generated files into the root folder of my webpack config.

I also believe that opening all the options would make this loader more flexible.