Bukkit

Merging in latest from upstream (SPIGOT/bukkit:refs/heads/master)

* commit '29e9b367a4abdf77098b02318c22f24b92a218d2': (35 commits)
  SPIGOT-974: Add ArmorStand locking API
  #543: Let World#setSpawnLocation() support an angle
  #540: Add Inventory#isEmpty()
  #539: HumanEntity - add a method to make the entity drop the item they're holding
  #537: Add EntitySpellCastEvent for spellcaster illager
  #538: Un-deprecate now implemented player portal event api
  SPIGOT-4705: Revamp Ageable interface and add Breedable interface
  #536: Add missing ItemFlag.HIDE_DYE
  SPIGOT-6065: Allow empty AttributeModifier name
  Update to Minecraft 1.16.2
  #491: Add support to change block's lid state
  SPIGOT-6037: Smithing inventory incorrect name
  SPIGOT-6017: BoundingBox#rayTrace returns incorrect null
  SPIGOT-5950: Add PrepareSmithingEvent event
  #525: Add contributors plugin.yml field.
  #529: Added getRecipe() method to retrieve a Recipe by it's NamespacedKey
  SPIGOT-5982: Update documentation for EntityChangeBlockEvent
  #523: Added explicit API to stop a Jukebox from playing
  SPIGOT-5969: Update maximum structure block size
  SPIGOT-5970: Update JavaDocs information regarding WorldCreator#generatorSettings
  ...