Java Edition 1.12-pre4

1.12-pre4 is the fourth pre-release for 1.12.

Commands

 * Added new arguments:
 * - runs the function only if the specified selector is found (currently only matches 1)
 * - runs the function except when the specified selector is found (currently only matches 0 or 2+)
 * - runs the function except when the specified selector is found (currently only matches 0 or 2+)

Items

 * Maps
 * Beds now have the correct color on the map.