chore: drop Python 3.8 and 3.11 support

Remove Python 3.8 and 3.11 from the CI matrix, tox envlist, pypi-publish
workflow, setup.py classifiers, and README compatibility statement.
Python 3.12 remains.

Part of the Open edX initiative to drop Python 3.11 support:
openedx/public-engineering#499

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

Author: feanil

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: ['3.11', '3.12']
+        python-version: ['3.12']
         toxenv: [quality, django42, django52, check_keywords]
 
     steps:

.github/workflows/pypi-publish.yml

@@ -16,7 +16,7 @@ jobs:
       - name: setup python
         uses: actions/setup-python@v4
         with:
-          python-version: 3.11
+          python-version: 3.12
 
       - name: Install pip
         run: pip install -r requirements/pip.txt

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 3.8, Django 2.2 and Django 3.0
+This package is compatible with Python 3.12, Django 4.2 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

@@ -130,7 +130,6 @@ def get_version(*file_paths):
         'License :: OSI Approved :: GNU Affero General Public License v3',
         'Operating System :: OS Independent',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.11',
         'Programming Language :: Python :: 3.12',
         'Framework :: Django',
         'Framework :: Django :: 4.2',

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py{38,311,312}-django{42,52},quality
+envlist = py{312}-django{42,52},quality
 
 [pycodestyle]
 max-line-length = 120