Java Edition 18w43c

18w43c is the third snapshot released for 1.14, to fix bugs in 18w43a and 18w43b.

Additions

 * Debug screen
 * Added server tick-times to charts (in singleplayer).
 * Added min tick times to charts to help find stutters.

Changes

 * Performances
 * Stopped the mob-cap from growing infinitely.
 * Improved stuttering in client and server.
 * Improved performance.