[Added] A new stat type: Waves Passed. It counts the maximal wave that player has reached on the arena. [Added] An arena option to enable/disable mcMMO on the arena.
[Changed] Stats are now only generating if the player has played the arena at least 1 times.
[Fixed]A bug where mobs have been despawned sometimes if the size of arena is large. [Fixed]A bug where one arena kill mobs in all arenas. [Fixed] A bug with player lives. [Fixed] Some bugs with Arena editor. [Fixed] Long NPC names in leaderboards. [Fixed] Integration with PlaceholderAPI. [Fixed] Console errors caused by commands and signs.