Changes for normal players

• Added very rare giant obelisks.
  • Decorated with a new "automata" block, which has some interesting interactions with redstone.
• Rivers now split up and take slightly different paths.
• Tweaked size and frequency of mega trees.
• Lakes are now larger and rarer.
• End fractal structures are now larger and rarer.
• Abandoned cities are now rarer.
• Fixed platform-typed skylands being extremely lopsided sometimes.
• Lapis ore now spawns in rivers, in addition to under oceans.
• Diamond, gold, and redstone ore are now more common.
• The player should no longer spawn inside or on top of structures, or inside a cave.
• Fixed /locate command being unable to find rivers.
• Fixed swamp wasteland biome not spawning in the world.
• Possibly fixed crash that could occur with some mods.
• Possibly fixed player being able to fly after leaving hyperspace when using Sinytra connector.
• Fixed budding quartz not dropping rough quartz.
• Performance improvements.

Changes for data pack makers

• Voronoi cells now have a center_column field, useful for querying column values at the center of the cell.
• Layers (not rock layers) can now once again be defined inline if desired.
• Structures are no longer limited to 17x17 chunks in size.
• Structure.terrainAdaptation is now exposed to scripts.