Polysit 0.8.4 for Minecraft 1.21.2-1.21.4

Changes since 0.6.2

• Cap compatible version to <1.20.5
  • Mitigates #9
• Tests entity Y at ground level when possible
  • Mitigates #3
• Check bounds on sit
  • Fixes #8
• Add sit keybind, defaults to G
  • Partially implements #3
  • /sit now toggles instead of just sits.
• Fix bad adjustment code needlessly phasing the player through blocks.
• Seat is now damageable
  • This means TNT will now launch you when it explodes near by.
• Improve checks for better UX
• Add better Pehkui support
• Prevent needless phase through blocks
• Fix various offset bugs
• Add 1.21.2-1.21.4 support