Upgrade to Django 6.0

[a5m0]

Description

Upgrade to Django 6.0 (ref #6226)

Changes

• Update django 5.2.12 -> 6.0.3 and pyup constraint < 6.0 -> < 7.0
• Update ADMINS setting from deprecated tuple format to string format (deprecated in Django 6.0)
• Update django-upgrade pre-commit target from 5.2 to 6.0
• Remove outdated Pillow pyup constraint
• Update pyproject.toml Django framework classifier

Dependency Compatibility

All dependencies verified compatible with Django 6.0, no git installs or constraint overrides needed:

Package	Version	Django constraint
django-celery-beat	2.9.0	Django<6.1,>=2.2
django-storages	1.14.6	Django>=3.2
django-allauth	65.14.3	No upper bound
djangorestframework	3.16.1	No upper bound
django-redis	6.0.0	No upper bound
django-model-utils	5.0.0	No upper bound
drf-spectacular	0.29.0	No upper bound

Testing

• Generated project with cookiecutter --no-input (use_celery=y, rest_api=DRF, use_whitenoise=y)
• manage.py check: 0 issues
• manage.py migrate: all migrations applied
• pytest: 31/31 tests passed

Checklist:

• I've made sure that tests are updated accordingly
• I've updated the documentation or confirm that my change doesn't require any updates

Rationale

Django 5.2 enters extended support (security fixes only) while Django 6.0 is now the actively supported release. All dependencies already support Django 6.0 on PyPI — the only blocker was django-celery-beat, which was resolved in their 2.9.0 release (Django<6.1).

Fix #6226
Closes #6233

[Copilot]

Pull request overview

Upgrades the Cookiecutter Django template to target Django 6.0, aligning dependency pins, template settings, and related tooling/configuration with the new major version.

Changes:

• Bump Django pin to 6.0.3 and adjust pyup constraint to < 7.0; remove outdated Pillow pyup constraint.
• Update ADMINS setting format in the generated project settings and adjust generation test expectation accordingly.
• Update django-upgrade pre-commit target version and refresh Django version references/classifiers (README + pyproject).

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
{{cookiecutter.project_slug}}/requirements/base.txt	Updates Django pin/pyup constraint and removes outdated Pillow constraint comment.
{{cookiecutter.project_slug}}/config/settings/base.py	Changes ADMINS representation for Django 6.0 compatibility.
{{cookiecutter.project_slug}}/.pre-commit-config.yaml	Updates django-upgrade target version to 6.0.
tests/test_cookiecutter_generation.py	Updates assertion to match new ADMINS formatting in generated settings.
pyproject.toml	Updates trove classifier to Django 6.0.
README.md	Updates stated supported Django version to 6.0.

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[browniebroke]

There are still a few packages with a red cross on #6226 but most of them are actually running fine under 6.0 (I use most of them on a project).

The only exception is django-stubs:

• CALL TO ACTION: Adding Django 6.0 stubs typeddjango/django-stubs#2944

We test mypy on the generated project but we don't use a lot of Django features. I wonder if folks will run into frictions into their project after adding stuff because support wouldn't be fully there?

On the other hand, a type check issue can be silenced with a comment and hopefully it won't be too long before they release django-stubs 6.0

[browniebroke]

Looks good to me. I didn't see any mentions of dropping Postgres version this time around