Lithostitched

• Introduced an optimization to density function caching. This will be most noticeable when playing with heavy worldgen packs like Tectonic or Lithosphere.
  • A special thank you to Unnecessarymb and Evanbones for finding and implementing this optimization, respectively.
• Fixed the fields on the offset placement modifier being non-optional.
• Fixed the dungeon feature type not working.

This update also restructures the mod's backend, hence the minor version bump. While this shouldn't result in any breakages, this version is marked as a beta just in case.