Does not work with discord.py v2.0

[FightMan01]

Discord.py v2 removes the on_socket_response event so the library won't work. Instead we will have the on_raw_socket_receive event.

[Jackenmen]

Red-Lavalink will not work with d.py 2.0 until it is actually released and until Red also supports it.

I'll keep this open for now though since it does contain helpful information and we will have to work on this eventually, thanks!

[FightMan01]

Well, I thought it :D I'm working on a solution unfortunately I can't decompress the binary data. If I figure out the solution, I will open a PR.
Also this commit can be helpful: Rapptz/discord.py@e2250d4

[Jackenmen]

We'll probably switch to VoiceProtocol rather than use on_raw_socket_receive, see #97.

Sadly, on_socket_event_type isn't useful for our case so the VoiceProtocol is probably the best we'll be able to do without hurting performance by doing zlib decompression on all events. I say "sadly" because it will take some effort to migrate to that interface, but in the long run, it would be good for us to use it anyway.