LevelledMobs

Thanks to @stumper66 and @UltimaOath for working on this update!

• Folia server compatible
• added death cause kill which is new for Minecraft 1.20
• added a new placeholder for use with the health indicator: %health-indicator-color%
• the following placeholders will now include &r at the end to prevent unintended color bleed-over: %levelledmobs_mob-target%, %levelledmobs_displayname%, %levelledmobs_killed-by%, %displayname%, %health-indicator%, %player%
• added player-variable-match-value to customdrops
• fix the command /lm debug nbt_dump sometimes returning an empty string
• removed MicroLib internally
• various code refactoring