While this is not a big feature update, it's a big recode to some systems, no metter your server version I would recommend testing the plugin yourself before doing major server updates, report bugs via PM or discussion.
Will not force you to use Java 16, it should still work on Java 8, but please update to Java 16 as soon as all your plugins can support it.
Added PlaceholderAPI support for chat-format.
Fixed minor issues with players leaving the game.
Fixed Wither Effect not being removed.
Fixed HealthBar not updating correctly after damage from some specific damage causes.
Fixed Scoreboard would leave empty strings if a objective is not set, counting as a full line.
If you want a blank line on the Scoreboard, please use ' ' (leave a space between the '), otherwise the Scoreboard will skip this line.
Optimizations to Scoreboard Updates, Enderman Class Recall and some tasks to prevent unnecessary Resource Usage.