Amethyst Core 1.4.1+1.20.1

Added spell critical chance and spell critical multiplier Entity Attributes
Added new integration with Spell Power Attributes, for adding spell power attributes if SPA is loaded.
Added special dual-purpose methods for Cooldown, cirtical chance, and critical damage. Adds wither SPA or AC attributes with appropriately scaled values depending on if SPA is loaded or not.
Player Experience attribute now removes it's bonus if experience is removed using the addExperience method, in an effort to balance "Feedback loops" from mods like Spelunkery