New reward events were added to config.yml. Those are not necessarily rewards, but the name of the section in config.yml has been kept.
player-game-start - Runs for each player when the game starts.
player-early-leave - Runs for each player who leaves before the game ends.
team-win - Runs once for the winning team at the end of the game.
player-team-win - Runs for each member of the winning team at the end of the game. This is similar to player-win, however the new placeholder runs for all team members, even if these players have already left the game or were killed.
game-start - Runs once when the game starts.
Additionally, commands defined in rewards now accept new variables: {playerUuid}, {game}, {team} and {death} (returns true/false). Whether or not they are available depends on the context. For example, game-start provides {game}, but not {player} or {playerUuid}.
Changes:
Support for version 1.20.3 has been removed. This should not affect anyone since this release has been replaced by 1.20.4 just in 2 days after its release, and most server software (including Paper) is not available for 1.20.3. However, if you happen to use 1.20.3, please update to at least 1.20.4.
Fixes:
Fixed waterlogging a block does not revert the state upon rebuilding
Fixed spectators are able to teleport to players outside of the arena