Yep, a beta, which is also available in the discord. But this version is a lot more stable than the version before. I suggest you to create a backup of your worlds, yet there aren't any reports with worlds disappearing. There's is still some stuff missing for the 3.3 release and do not expect, that every new feature will work flawlessly. Send me bug reports if you find any, like always.

Added feature:

• Added support for 1.12.2

Minor changes:

• Improved Netty support for 1.7
  
• Remove d"Future isn't done" Exception in FutureResult and replaced it with something that is waiting until the future's done. #WhyAreSomeUsingThis
  
• Improved SQL performance

Added config:

• tnt-canbreakblocks-breakby-player

Fixed bugs:

• Fixed that always-day didn't worked correctly
  
• Fixed that spectators are kinda visible for normal players
• Fixed that it is possible to get the items of a spectator in lobby when leaving in BungeeCord mode
• Fixed that a player was getting automatically kicked if the spectator point was outside of the arena, the player shouldn't be able to move instead
• Fixed that a player vote isn't getting removed in when he is leaving an arena
  
• Fixed some read/write problems with SQL
  
• Fixed that the update checker didn't work
  
• Fixed that /bw arena getpositionaxe never worked

API changes:

• Added 'boolean isDisabledForRound()' to DropType
• Added 'void setDisabledForRound(boolean state)' to DropType