[v0.40.0-rc4](https://github.com/ash-project/ash_postgres/compare/v0.40.0-rc3...v0.40.0-rc4) (2021-06-23)
Bug Fixes:
* always add nullability flag
* sort references only after other same-table ops
* generate multitenant foreign keys properly
Improvements:
* leverage new `private_vars` for errs