Add the plugin to storybook

Hi,

I'm trying to add the plugin globally in my Storybook instance.

```
import Device from '@nuxtjs/device';

Vue.use( Device, { refreshOnResize: true });
```

But it seems that the options are not transmitted to the plugin as I'm facing the following error:
TypeError: this.options is undefined

Do you have an idea on how I can inject it into my Vue instance ?
Thanks a lot :) 