feat!: drop Django 4.2 support

Django 4.2 reached end-of-life in April 2024. Remove the django42
tox env and classifier; social-auth-app-django>=5.7 requires Django>=5.1
so Django 4.2 is no longer compatible with the latest dependencies.

BREAKING CHANGE: Django 4.2 is no longer supported. Requires Django 5.2+.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: feanil

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
       matrix:
         os: [ubuntu-latest]
         python-version: ['3.12']
-        toxenv: [quality, django42, django52, check_keywords]
+        toxenv: [quality, django52, check_keywords]
 
     steps:
     - uses: actions/checkout@v3

README.rst

@@ -8,7 +8,7 @@ auth-backends  |CI|_ |Codecov|_
 
 This package contains custom authentication backends, views, and pipeline steps used by edX services for single sign-on.
 
-This package is compatible with Python 3.12, Django 4.2 and Django 5.2
+This package is compatible with Python 3.12 and Django 5.2
 
 We currently support OAuth 2.0 authentication. Support for OpenID Connect (OIDC) was removed as of version 3.0. Use version 2.x if you require OIDC and are not able to migrate to OAuth2.
 

setup.py

@@ -132,7 +132,6 @@ def get_version(*file_paths):
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.12',
         'Framework :: Django',
-        'Framework :: Django :: 4.2',
         'Framework :: Django :: 5.2',
         'Topic :: Internet',
     ],

tox.ini

@@ -1,12 +1,11 @@
 [tox]
-envlist = py{312}-django{42,52},quality
+envlist = py{312}-django{52},quality
 
 [pycodestyle]
 max-line-length = 120
 
 [testenv]
-deps = 
-    django42: Django>=4.2,<4.3
+deps =
     django52: Django>=5.2,<5.3
     -r{toxinidir}/requirements/test.txt
 commands =