UpgradeableSpawners - Levels 4.15.19

+ Added: You can now place UgradeableHoppers beneath spawners to automatically insert
items that result in the usage of the butcher feature.

+ Added: [#2180] Option to forcefully enable butcher mode for all spawners:

  # For all spawners to have butcher mode enabled?
  # This does save performance, since no living entities are spawned. This acts like a virtual spawner
  # that doesn't spawn any entities, but still harvests their loot.
  # If you disable this option again, then butcher mode will be set to the state each induvidual spawner had before
  # it was enabled.
  force-butcher: false

+ Added: Chance to retrieve spawner on silktouch

    # Chance to retrieve the spawner in percent.
    chance: 100

- Fixed: Error on saving new spawner

+ Added: [Suggestion] You can now manually pause a spawner in its menu
    Also this adds some more information on why spawners are paused.

- Fixed: DB issue

- Fixed: [#2195] Issue with spawning if spawn amount is 1

+ Changed: Save spawner immediately if upgrade menu closed and changes were made, async ofc.

+ Added: Option to disable stacking for vanilla spawners as well:

- Fixed: [#2182] Entity stacking not completely disabled for vanilla spawners
- Fixed: [#2178] Reducing stack amount did not call entity death event for 3rd party plugins

+ Added: [Suggestion] Entities are now being stacked. Whenever a spawner spawns entities, they will now be stacked if possible.
If it can't find an entity of this type in a radius of 8 blocks, then it will spawn a new entity and stack the rest.

1. You can disable this in stacking.yml.
2. The remove-ai option has been moved to stacking.yml as well, and it's state defaults to false.

- Fixed: [#2151] Not being able to disable period_amount upgrade by setting period time to 0
    This should also fix spawning issues with servers, having that set to 0.

# Allow vanilla spawners to spawn entities?
spawn: true

+ Added: [Suggestion] Option to blacklist AI removal

  remove-ai:
    enabled_4: false
    # Here you can add entity types that should keep AI.
    # List of entity types: https://hub.spigotmc.org/javadocs/spigot/org/bukkit/entity/EntityType.html
    blacklist_list: []

+ Added: Option to allow/ignore cancellations of entity spawns, because of 3rd party plugins

  # Should entity spawn cancellations from 3rd party plugins be allowed?
  # While disabling this option might be helpful, if you want to exclude upgradeable spawners spawn rate from being
  # limited by 3rd party plugins, it might have unintended results with, for example, stacking plugins.
  allow-cancellations: true

+ Added: Debug option

    # Configure logging
    logging:
      # We might ask you to enable this, when you submit a bugreport.
      debug: false

- Fixed: Entity type name not applied in main menu from entities.yml
- Fixed: [#2089] Unknown message for teleportation progress

- Fixed: Incompatibility with executable items

+ Improved: Evaluation of spawn location when no-conditions enabled

+ Improved: Spawner saving procedure

- Fixed: [#1998] Wrong spawn loc if no-conditions disabled

+ Added: API: getSpawner
+ Improved: Compatibility with entity stacking plugins
- Fixed: Minor issue with no-conditions leaving one spawn in edge cases

+ Changed: Adjust spawn height for spawn task
- Fixed: Error at filtering player