Bosslike Ender Dragon

Released as Beta. Tested by the automated tests on every loader (the whole fight with and without YUNG's Better End Island, a fight with True Ending, and a dragon saved in the middle of its death); not played by hand.

Changed

• Perched attacks take turns. After the Ground Pound, Wing Buffet or Tail Swipe, none of them starts again until a shared 3-second cooldown runs out (perchAttackCooldownTicks), so they no longer run into each other. A Wing Buffet that's due waits for it too. Each attack keeps its own timer on top of that. No config version change.

Fixed

• Works with True Ending (the datapack and the mod version). With both installed, True Ending's final blow left the dragon stuck at 1 health: this mod turned the killing blow into its dying flight, while True Ending holds the dragon over the portal, so the flight never ended and further hits did nothing. A dragon True Ending runs now dies where it sits, as True Ending intends, and once True Ending's final blow starts this mod's attacks, Final Stand and health floors stand aside until the dragon dies.
• A beaten dragon could come back. If the End was saved while the dragon was flying into the rift to die (for example because the player who killed it died at the same moment, leaving nobody in the End), it came back at 1 health and had to be killed again. It now finishes its death when the End loads again.