Minor bug fix: Removes a few printed startup errors which don't affect the plugin at all but are annoying to look at on versions older than 1.16.4.

Original Changelog:
=== v1.2.0 ===
+ Added cumulative breeding to breed multiple entities in a stack at once
+ Added WorldGuard region check called 'rosestacker', disabled by default for performance reasons
+ Added advanced spawner permissions, more info can be found in the config
+ Added a mob head display to the stacked spawner GUI
+ Added a total mobs spawned count to the stacked spawner GUI
+ Added a separate setting for the item stack task (now separate from the normal stack task)
+ Added setting to allow picking up stacked spawners in creative mode
+ Added setting to prevent stacking active raiders (enabled by default)
+ Added setting to allow disabling the instant stack functionality
+ Added LogBlock support for stacked block/spawner logging
+ Added isNew boolean to BlockStackEvent and SpawnerStackEvent
* Rewrote entity and item stacking entirely, hugely improving performance
* Rewrote how mobs are spawned from spawners, hugely improving performance
* Better compatibility with spawner shop plugins
* Changed default entity stack frequency to 100 ticks
* Mobs with disabled AI no longer combust in the sunlight
* Mobs with disabled AI no longer make any sounds
* The stacktool will now notify you if you try to check a mob that isn't part of a stack
* Added setting to allow MythicMobs stacking, does not ensure compatibility, use with caution
* Fixed BlockStackEvent and SpawnerStackEvent not firing on first place
* Fixed spawn eggs of size 1 not being removed from inventory in survival
* Fixed stacked item pickup into offhand sometimes being lossy
* Fixed misaligned entity bounding box detection causing issues with spawner spawn areas
* Fixed spawners being able to spawn mobs inside of chests
* Fixed TrHologram support since they changed the API
* Fixed stacktool AI visibility always showing true even when disabled
* Fixed spawner fling particles sometimes appearing when they shouldn't