Download: https://ci.athion.net/job/FastAsyncWorldEdit-1.16/

Fixes:
- Fixed tab completion for biomes and tree types
- Fixed tab completion for brushes and many other commands
- Fixed copying of complex entity parts (e.g. players, since you can't copy them)
- Fixed a few minors with missing translations keys
- Fixed deadlock with `//confirm` and permission/limits

Changes:
- Optimized biome retrieval during `//regen`

Additions:
- Added 1.16.4 support
- Reimplemented `#offset` mask
- Implemented biome-specific `//regen`
- Full support for 3D biomes