Bug Fix:
- Possible fix to rare concurrent modification error when player join/leave server
- Mount armor stand desync with model when in Animation B
- ModelPart targeter throwing null pointer

Change:
- Removed Fall and Land default states
- Better error description of Invalid Angle Error
- Mount armor stand would also be packeted

New Feature:
- 1.17 & 1.17.1 support
- Jump default state
- Async model ticking (toggleable)