Wagtail 7.0 Maintenance

[nickmoreton]

This pull request updates the tox.ini configuration to align with the latest supported versions of Django and Wagtail.

Updates to version compatibility:

• Updated the envlist in tox.ini to include Wagtail 6.3 & Wagtail 7.0 and adjust the associated Django version ranges accordingly.
• Updated dependency version ranges in the [testenv] section to include Django 5.2 and Wagtail 7.0 while removing references to Django 5.0 and Wagtail 6.2.

[ianmeigh]

Suggestion: We are in the new position of having two LTS versions that will be supported for about the same length of time, so what do you think about adjusting the tests to include 6.3 and 7.0 in all tests?

py{39,310,311,312}-django42-wagtail{63,70}
py{310,311,312,313}-django{51,52}-wagtail{63,70}

Or, as Wagtail 5.2 has not reached EOL, would you prefer to replace it in the old LTS test:

py39-django42-wagtail63

[nickmoreton]

Thanks @ianmeigh I prefer option 1

[ianmeigh]

Suggestion: Bump the version of Wagtail in the optional dependencies:

[project.optional-dependencies]
dev = [
   # ... existing deps ...
    "wagtail~=6.3",
]

[ianmeigh]

Include this work in the CHANGELOG.

[nickmoreton]

Suggestion: Bump the version of Wagtail in the optional dependencies:
...

I decided to use a different syntax here as well. After some digging around ~= only installs that major version as far as I can tell. I did another change too to use python 3.13

[nickmoreton]

Include this work in the CHANGELOG.

Thanks for spotting that 👍 Updated

[ianmeigh]

Thanks @nickmoreton, LGTM!