Update Note:
In this update, @stumper66 and @_ProfliX_ have kindly worked on an assortment of fixes and improvements to LevelledMobs to improve your experience!
Simply replace the new version from the old into your plugins folder, and (re)start your server. LevelledMobs will handle any file changes automatically.
Reminder: if you need assistance, or have a question, issue or suggestion with LevelledMobs, you can reach out to us on our Discord Server. This is also linked on our Spigot page.
Thank you to the users who reported bugs and suggested features for us to add in this update.
To see what we changed in this update please continue reading below.

We're fueled by your support:
LevelledMobs is provided as 'premium' quality by our team, completely free of charge to you. This includes the working plugin file, the full source code, and some of the best support provided on the platform. This takes hours and hours of our free time. Please support our work so we can continue to support LevelledMobs with no price tag.

• Donate to @stumper66 (aka PenalBuffalo), who currently maintains LevelledMobs 3:
  • Donate on Ko-fi
  • Donate on PayPal: [email protected]
  • (Donators are eligible to receive roles on our Discord )
• Post a review on our Spigot resource page in the reviews section, with however much or little detail you wish to include. It's highly appreciated. <3
  
• Star our GitHub repository.
• Share it to whoever may be interested!

Full Changelog:

• Fixed non-english player death messages changing to english (Paper servers only)
• added LM spawn egg support (#197, Paper servers only)
• implemented Cause of Death feature improvements in CustomDrops (#300)
• added player levelling rule decrease-level with default value of true (#295)
• added PAPI placeholder %levelledmobs_mob-target% which returns the nametag of the mob you're looking at (#318)
• added two new rules under apply-settings: nametag-placeholder-levelled and nametag-placeholder-unlevelled
• added new setting to settings.yml: nametag-placeholder-maxblocks with default value of 30
• added support for multiple nbt-data inside rules. Can be an arraylist or string. Can also merge between rules (#323)
• changed custom drops and rules that use role-chance logic to use a different formula and float datatype so that small chance numbers work as expected
• when using nbt-data and have the 'NBT_APPLY_SUCCESS' debug enabled, it will show what fields were changed/added/removed
• messages.yml has been incremented to version 7. Two new sections have been added and various messages added
• debug-misc values are now case-insensitive
• added support for stringed tiers in player levelling options (#315)
• added 3 new variable for use with player levelling: %home_distance%, %home_distance_with_bed%, "%bed_distance% (#292)
• general code improvements, refinements and removal of unused code (many contributions from @_ProfliX_)
• improved locking code to prevent potential server crashes / hangs
• added new rule condition spawner-egg-names
• backend code changes; removed star imports and a few small optimizations
• command /lm rules show_effective now mentions the world name

Thank you all very much!