[v2.16.0](https://github.com/ash-project/ash/compare/v2.15.20...v2.16.0) (2023-10-25)
Features:
* Add unknown argument error when passing an unknown key to an action. (#750)
Bug Fixes:
* don't reorder global validations/changes
* use latest spark, and new persisters callback
* properly validate belongs_to relationships
* remove invalid usages of `unsafe_change_attribute/3`
* handle builtin types in unions (#752)
Improvements:
* Add ash_three? feature flag for Ash 3.0 related behaviors.