Renaming UnArchiveAction to UnarchiveAction

[dissto]

It's just a thought though but I think the action should be named UnarchiveAction as opposed to UnArchiveAction.

I'm not a native English speaker, but i'm sure that unarchive is one word. 🤓

[rvzug]

Yeah, fair question... I followed the naming-convention of the Archivable-package, see: https://github.com/joelbutcher/laravel-archivable/blob/1.x/src/Archivable.php#L116