Voice channel mention (jagrosh#932)

* Voice channel mention

I recently noticed voice channels can be mentioned just like text channels. A small change to the code to implement this feature.

* Voice channel mention

* vc.getName() changed to vc.getAsMention()

update reference.conf

whoops

Merge origin/master

Merge origin/master

deps

deps update and small code cleanup

update deps and deal with discords new ratelimits

fix windows path loading bug

fix empty game bug

update lavaplayer