* run black
* create monkeypatching function for adding get_item dunder
* whoops i forgot the test
* change the name in INSTALLED_APPS to make test pass
* turn the whole thing into a proper package
* move django_stubs_ext to requirements.txt
* also install requirements.txt
* attempt to fix pre-commit
* numerous small code review fixes
* fix dependency issues
* small dependency fixes
* configure proper license file location
* add the rest of the monkeypatching
* use strict mypy
* update contributing with a note monkeypatching generics
* copy release script from parent package
* change get_user to use a protocol requiring a session
define a "_HasSession" protocol, and update contrib.auth.get_user to use it
get_user only requires a session field, and idiomatic django testing frequently calls get_user with a TestClient
* run black
* use union for get_user instead of a protocol
* create tests for get_user typechecking
* properly import test client
* make BaseModelAdmin generic to properly type the `obj` argument of ModelAdmin.delete_model
closes#482
* turn BaseModelAdmin into bound generic, run black
* add test for generic ModelAdmin