* added basic support for cmake (#127)
* renamed Winter Drop version from MC_1_21_3 to MC_1_21_WD
* updated world spawn location for 1.21.2 (cubiomes-viewer #340)
* tweaked mc version to text conversion (#128)
* removed properties field in structure config and added dimension field instead
* moved biome tree selection back to biomenoise.c as it's slightly faster and avoids globals
* added pale_garden biome with 1.21.3 (version TBA)
* added small end islands and better end surface generation (#117)
* added linked end gateway finder (#117)
* fixed inaccurate End generation at large distances from 0,0
* fixed incorrect biome in outer end rings
* fixed incorrect biome area size (#122)
* moved biomenoise from layers.h into its own object
* moved biome tree data into separate header files for each version
* added global for the biome tree data to make runtime providers possible
* fixed outpost not generating in cherry_grove
