#682 Added support for Minecraft 1.21.9. Please notice that the gray, blue, green, etc. highlighting of arena selection does no longer work in 1.21.9. Mojang has removed the way to set custom colors and custom messages for block selections. When you select a block using the BlockBall axe, it glows green now. This does not have any impact on BlockBall gameplay, it only makes setting up arenas more difficult.
#677 All commands do now support the new property playerPermission, which allows to only execute commands for a certain permission group. e.g. configuring winCommands where only VIP players with the permission yourpermission.vip receive diamonds on match win.