Wagtail 7.4 Maintenance

[nickmoreton]

Summary

Aligns supported Python, Django, and Wagtail versions with the official support matrices as of 2026-05-26.

• Wagtail: drop 6.3 LTS (EOL 2026-05-01) and 7.1 (EOL); target Wagtail 7.0 LTS, 7.3, and 7.4 LTS.
• Django: drop 4.2 and 5.1 (both EOL); target Django 5.2 LTS and 6.0. Django 6.0 requires Python 3.12+, so the tox matrix restricts those combos accordingly.
• Python: add 3.14 (classifiers, tox [gh-actions] map, and the CI python matrix). Wagtail 7.0 LTS does not support Python 3.14, so that combo is excluded from the envlist.
• Build: replace deprecated python setup.py bdist_wheel sdist with python -m build.
• Dev pins: relax coverage, factory_boy, and black from exact pins to ranges.

No source-level changes were required — the package has no version guards or moved imports. Coverage remains at 100% across the representative tox envs run locally.

Commits are split per the package modernisation policy:

1. Production: classifiers, install_requires, tox.ini, CI Python matrix, CHANGELOG.rst.
2. Dev tooling: testing extras and build step.

Sources (retrieved 2026-05-26):

• https://devguide.python.org/versions/
• https://www.djangoproject.com/download/
• https://github.com/wagtail/wagtail/wiki/Release-schedule
• https://docs.wagtail.org/en/stable/releases/upgrading.html#compatible-django-python-versions

Test plan

• tox -l resolves the envlist cleanly
• tox -e py312-dj52-wagtail70 passes (Wagtail 7.0 LTS)
• tox -e py312-dj52-wagtail74 passes (Wagtail 7.4 LTS)
• tox -e py312-dj60-wagtail74 passes (Django 6.0 + Wagtail 7.4 LTS)
• tox -e black,flake8,isort pass
• GitHub Actions matrix run is green across Python 3.10–3.14
• python -m build job uploads sdist + wheel and twine check passes

🤖 Generated with Claude Code

[nickmoreton]

When merged we no longer need:

• Wagtail 7.3 maintenance #63
• Wagtail 7.2 maintenance #62