LevelledMobs

A massive thank-you to PenalBuffalo for writing this update!

Changelog:

• when enabled (default) LM will store a hash against the current ruleset on each mob. If the rules change then that stored hash value will become invalid and when that chunk is loaded or a player is near the mob, the rules will be reevaluated
• added new setting in settings.yml: check-mob-hash
• fixed a bug when running command /lm reload it would start another instance of the async task scheduler
• two new rules relating to the chunk kill max system: disable-item-boost-on-chunk-max and disable-xp-boost-on-chunk-max
• when using the chunk kill max system and have disable-vanilla-drops-on-chunk-max set to true, xp drops are disabled as well
• if a mob has low remaining health and gets relevelled to a lower level, it will no longer die by having it's health reduced to 0
• overhauled some preset merging code
• fixed parsing of custom death messages in rules.yml
• fix error on Minecraft 1.16 when a player dies
• fix issue on Minecraft 1.16 Paper servers where hex color codes were not getting translated
• fix issue on Minecraft 1.16 when players first join the world they see nametags with a few unresolved placeholders
• minor code refactoration
• bump maven dependency versions