Also ask for trashed items when checking for slug collection.

So, just did a quick update, which helped me with my project. Often we use softDelete on a model and also have a unique slug. That throws a DB error when trying to add a new "sluggable" model.

So what I did was I added a config option for the 'include_trashed' items, and update the make method with a check for a softDelete property and include_trashed config option.

Hopefully you'll find it helpful.

Cheers.