Colorful Dungeons

additions:
-added gray dungeon
-added achievements for entering dungeons for the first time, the advancement section shows the order in which dungeons should be visited and the biome where to find them

changes & fixes:
-tridents you can find can now have lifesteal
-pickaxes you can find's damage now scales the same as swords' damage
-all maces across dungeons now have the same attack speed
-light gray dungeon's miniboss now drops a sword instead of a mace
-starting from this update, the mod modifies the basalt deltas biome, so that it no longer generates basalt columns, as they used to ruin dungeons that spawned in that biome

other:
-changed license to MIT