New events dispatched by Audio.

 - :code:`on_red_audio_track_start(guild: discord.Guild, track: lavalink.Track, requester: discord.Member)`
 - :code:`on_red_audio_track_end(guild: discord.Guild, track: lavalink.Track, requester: discord.Member)`
 - :code:`on_red_audio_track_enqueue(guild: discord.Guild, track: lavalink.Track, requester: discord.Member)`
 - :code:`on_red_audio_track_auto_play(guild: discord.Guild, track: lavalink.Track, requester: discord.Member)`
 - :code:`on_red_audio_queue_end(guild: discord.Guild, track: lavalink.Track, requester: discord.Member)`
 - :code:`on_red_audio_audio_disconnect(guild: discord.Guild)`
 - :code:`on_red_audio_should_auto_play(guild: discord.Guild, channel: discord.VoiceChannel, play: Callable)`
 - :code:`on_red_audio_initialized(audio:Cog)`
 - :code:`on_red_audio_skip_track(guild: discord.Guild, track: lavalink.Track, requester: discord.Member)`
 - :code:`on_red_audio_unload(audio:Cog)`