Parcel support

[rgigger]

I wasn't sure where to put a request for a new type of template. But it would be great to see template for parcel.

[LinusBorg]

Parcel doesn't support .vue files (yet), so Im not sure that makes sense at this point.

I also personally think that we should try and concentrate on the webpack-related templates instead following every new trend. If Parcel should pick up momentum and can cover a wider range of usecases in the future, that may change, of course.

There's room for community-maintained templates, though :)