Update v2.2

So this is a huge update with a lot of new features! VTuber Plus now supports chat commands as well as Subscribe and Follow triggers! Therefore you'll need a new oAuth key and your old reward list will be erased on this update.

• Fixed the issue with loading custom items.
• Changed the rewards storage from file to registry. Previous rewards setup will be deleted.
• Added avatar switch to rewards.
• Rewards can now be triggered on "Subscribe" or "Follow".
• Chat commands can now be used to trigger rewards.
• Pies now stick to your head.