Added support for 1.21.9
- The nether carver that was before to make areas above open has been replaced with a new system of expanses which marks regions on the map to be open
- There's new cave rivers at the lava sea level
- Crimson and warped giant fungi now checks the terrain to see if it has space when it grows, this stops it from generating in small crevices
Fixed 1.20.5
Fix for newer versions
Added support for 1.20.1
Fix bug for versions 1.20.5-6
it was only working for snapshots
