Update TwitchLib packages, removed old event overrides from PubSub and Client

[ImCarsen]

Updated all packages to the latest:

• Costura.Fody -> 5.7.0
• Serilog.Extensions.Logging -> 3.1.0
• TwitchLib.Api -> 3.9.0
• TwitchLib.Client -> 3.3.1
• TwitchLib.PubSub -> 3.2.6

Mainly updated so I could get Predictions statuses from GetPredictions (which is now GetPredictionsAsync), so nothing new was added, just updated packages and removed any code which was causing errors (things which were removed or changed in TwitchLib, for example RitualNewChatter)

Tested in Unity 2023.1.0b9 and works as expected.

[Syzuna]

Thanks for that PR. Do you want to merge that now or wait for Pubsub and Client to be migrated to an updated/rewritten TwitchLib.Communications to fix some reconnection and disconnect issues and then do it with those versions?

[ImCarsen]

I guess that depends on two things.

• If there is not really a timeline for how long that will take, it might be better just to do it now and update again later.
• If the disconnection issues are not present in the current (d264b1f), and are with these package versions, it might be wise to just make a separate branch for this commit until PubSub and Client are migrated to the updated/rewritten TwitchLib.Communications that you mentioned. Just so it's there if people need the newer functions but don't mind working around possible disconnections.

Either way, if you pull now, whether it be to a separate branch or to master, once the packages update I might as well make another update. (Depends on how major the changes are, I could probably do it if I have the free time)

[swiftyspiffy]

I'm going to go ahead and merge this, we can make changes on top of this to account for updates from the core library.