Fixed:

• Health kits disappearing when coming back from the End
• Items appearing in all creative tabs
• Moved to using Forge registry events for registering stuff (sorry for not doing this earlier)

Basic support for 1.12.2 confirmed. If any issues are present please use the Github issue tracker.

Uploading this as a release version because I didn't really change much but please report bugs to my Github issue tracker. Thanks :3