New upstream version 3.4.3

.github/workflows/distribute.yml

.github/workflows/lint.yml

.github/workflows/test.yml

.gitignore

.travis.yml

CHANGES.md

README.md

ordered_model/admin.py

ordered_model/management/__init__.py

ordered_model/management/commands/__init__.py

ordered_model/management/commands/reorder_model.py

ordered_model/models.py

setup.py

tests/admin.py

tests/models.py

tests/settings.py

tests/tests.py

tox.ini