fix: Bot not disconnecting after queue finished

[TannerGabriel]

Delete queue when receiving the emptyQueue event so that the bot disconnects from the voice channel.

[TannerGabriel]

@elboletaire can you please validate that this fixes the disconnect problem you mentioned in #264

[elboletaire]

I can't easily try it RN, but the changes look good; I can also confirm the message ✅ | Queue finished! was being showed always when the queue finished, so disconnecting there should do the trick.

If you still want me to give it a try, I'll need some time (I'd try to do it in a few hours, but could be another day too, depending on the workload).

[TannerGabriel]

Thanks for the quick response and willingness to test, but you can take your time with it since it is nothing time-critical; a few days or a week are totally fine. I can also merge it without you testing since it worked on my machine - however you prefer.

[elboletaire]

I'd say to merge it then, I'll also be able to test it more easily once we have the docker image published ;) (well in this case, recheck it more than test it xD)

[elboletaire]

update: works like a charm 👌🏽