Remove Python 3.8 & Django 5.0

[kingbuzzman]

Removes:

• Python 3.8
• Django 5.0
• Updates imports because of ruff linter (the minimum python change)

[Copilot]

Pull Request Overview

This PR removes support for Python 3.8 and Django 5.0 and updates related configurations and type imports to align with a minimum Python version of 3.9. The key changes include updates to pytest test parameterization syntax, migration of type imports from typing to collections.abc, and adjustments to the testing matrix and classifiers in the project configuration files.

Reviewed Changes

Copilot reviewed 10 out of 13 changed files in this pull request and generated no comments.

File	Description
tests/test_runner.py	Updated pytest.mark.parametrize usage to use a tuple instead of a comma-delimited string.
tests/test_fixtures.py, test_database.py, pytest_django_test/db_helpers.py, pytest_django/runner.py, pytest_django/plugin.py, pytest_django/fixtures.py, pytest_django/asserts.py	Updated type import patterns to use collections.abc for forward compatibility.
pyproject.toml	Adjusted the minimum Python requirement (>=3.9) and updated Django classifiers.
.github/workflows/main.yml	Removed Python 3.8 test jobs to reflect the new minimum Python version.

Files not reviewed (3)

• README.rst: Language not supported
• docs/contributing.rst: Language not supported
• tox.ini: Language not supported

Comments suppressed due to low confidence (2)

tests/test_runner.py:9

• [nitpick] Using tuple notation for pytest.mark.parametrize is valid, but please ensure that the team agrees on this style for consistency across the test suite.

('kwargs', 'expected')

.github/workflows/main.yml:131

• The removal of Python 3.8 test jobs aligns with the updated minimum Python version; ensure that any related documentation and usage notes are updated accordingly.

-        - name: py38-dj42-sqlite-xdist-coverage

[bluetech]

Just one comment, otherwise looks good to me, thanks @kingbuzzman! Feel free to merge after the fix.

[bluetech]

We should keep one job testing the pytestmin. Best to just bump this one to py39.

[kingbuzzman]

@bluetech can we release a little minor for this? I can see this being a little annoying for folks.