- Migrated to twitch helix api for stream notifications

- Added 2 new fields to creds.yml -> TwitchClientId and TwitchClientSecret
- Users now have to provide them in order to use twitch stream notifications as Twitch is shutting down old api on 18th of February 2022
- Possibly fixed some issues with streams randomly getting cleared
- Added an incomplete trovo stream notification provider

src/NadekoBot/Modules/Music/_Common/Impl/MusicPlayer.cs

@@ -275,7 +275,6 @@ public sealed class MusicPlayer : IMusicPlayer
 
                 _ = OnCompleted?.Invoke(this, track);
                 
-                // todo update when settings are changed
                 if (AutoPlay && track.Platform == MusicPlatform.Youtube)
                 {
                     try