Too many options in the testing matrix

[jefftriplett]

It might be worth trimming down the tests. Testing against every version of Python and Django feels like overkill.

I think it's fine to:

• Test against every supported Django version
• Test against every supported Python version

I'm not sure we need or really want to test every Django version against every Python version.

[joshuadavidthomas]

My inexperience with creating third-party, installable Django apps showing through. I'll defer to your judgment and experience on this.

[jefftriplett]

All good. I'll probably drop DJ40 ala https://upgradedjango.com/4.0/

And then do some nox searching to see if anything sticks out.

[jefftriplett]

I'm not sure that I like this pattern but it's what I have been mulling over:

@nox.session(python=PY_VERSIONS)
@nox.parametrize("django", DJ_VERSIONS)
def tests(session, django):
    skip = should_skip(session.python, django)
    if skip[0]:
        session.skip(skip[1])


@nox.session(python=["3.8", "3.9", "3.10", "3.11"])
@nox.parametrize("django", ["3.2", "4.2"])
def pytest_django_lts(session, django):
    session.install(f"django=={django}")
    session.run("pytest")


@nox.session(python=["3.10", "3.11"])
def pytest_django_dev(session):
    session.install("https://github.com/django/django/archive/refs/heads/main.zip")
    session.run("pytest")


@nox.session(python=["3.11"])
@nox.parametrize("django", ["4.0", "4.1"])
def pytest_django_deprecation(session, django):
    session.install(f"django=={django}")
    session.run("pytest")