Java Edition 18w16a

18w16a is the thirty-second snapshot released for 1.13.

Additions

 * World Generation
 * New custom world type: Buffet
 * Readded a way to play with single biome worlds.
 * Can be created by selecting Buffet World as a world type.
 * Another way to generate chunks is available.
 * There might be more things added in the nexts versions.