v2.0.20 - ✨ Adding support for `None` values in where

Before

from abstra.tables import select

select("users", where={"organization_id": None}) # raise error since there was no support for None

After

from abstra.tables import select

select("users", where={"organization_id": None}) # SELECT * FROM users WHERE organization_id IS NULL

This same release also adds support for None values in insert and update methods.