chore: drop Python 3.11 support

Remove Python 3.11 from the CI matrix, tox envlist, pypi-publish workflow,
and setup.py classifiers. 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: [django52-drflatest, quality]
 
     steps:
@@ -38,7 +38,7 @@ jobs:
         run: tox
 
       - name: Run Coverage
-        if: matrix.python-version == '3.12' && matrix.toxenv=='django42-drflatest'
+        if: matrix.python-version == '3.12' && matrix.toxenv=='django52-drflatest'
         uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}

.github/workflows/pypi-publish.yml

@@ -15,7 +15,7 @@ jobs:
       - name: setup python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.11
+          python-version: 3.12
 
       - name: Install pip
         run: pip install -r requirements/pip.txt

setup.py

@@ -177,7 +177,6 @@ def is_requirement(line):
         "License :: OSI Approved :: Apache Software License",
         "Natural Language :: English",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
     ],
 )

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 envlist =
-    py{311,312}-django{52}-drf{latest}
+    py{312}-django{52}-drf{latest}
     quality
 
 [pytest]