feat: Add Django 6.0 support

[joseanoxp]

Summary

This PR adds support for Django 6.0 by updating the version constraint.

Changes

• Updated Django version constraint from >=3.2,<6 to >=3.2,<7
• Added Python 3.13 to classifiers
• Updated comment with Django 6.0 documentation link

Rationale

Django 6.0 was released in December 2024. After reviewing the codebase, particularly identity/django.py, I found that this library only uses stable Django APIs:

• django.shortcuts.redirect
• django.shortcuts.render
• django.urls.include
• django.urls.path
• django.urls.reverse

None of these APIs have breaking changes in Django 6.0. The library should work without any code modifications.

Testing

Tested with a Django 6.0 project and confirmed the library works correctly with the updated constraint.

References

• Django 6.0 Release Notes
• Django Python Version Support

[joseanoxp]

FYI: I opened a parallel PR in the upstream maintained by Ray Luo — rayluo/identity#64 — applying the same constraint widening (django>=3.2,<7) and Python 3.13 classifier.

That repo is what publishes the identity package to PyPI (this Azure-Samples copy is installed via git+ per the docs), so a merge there is what reaches pip install identity[django] users. The new PR also closes rayluo/identity#62 (the Django >6 support request).

Cross-referencing both PRs for visibility.