Tracking issue for getting the pieces into place to support Python 3.11 in Pillow 9.3.0, released on 2022-10-24.

• Wait for 3.11.0, expected Monday, 2022-10-24
• Update https://github.com/python-pillow/pillow-wheels
  • macOS: Python 3.11 has been released pillow-wheels#336
  • manylinux: Add CPython 3.11 pypa/manylinux#1317, Updated multibuild to include Python 3.11.0 pillow-wheels#337
• (#6441, #6433) Add Trove classifier, update setup.py version check, add to tox.ini, update Python support table
• Update CI targets table

Non-blockers

• Wait for 3.11.0 on GHA: 3.11.0 for MacOS Missing actions/setup-python#531
  • Replace 3.11-dev with 3.11 on GHA: GitHub Actions: Test Python 3.11.0 final #6686
  • 3.11-dev should pick up 3.11.0 on-flight fairly soon after release, and be added to cached images later
• Wait for 3.11.0 on AppVeyor: Python 3.11 appveyor/ci#3844
  • Replace 3.10 with 3.11 on AppVeyor: Updated AppVeyor to Python 3.11 #6723
• Wait for 3.11.0 on Travis CI (https://github.com/python-pillow/pillow-wheels): https://travis-ci.community/t/please-add-image-for-python-3-11/13384: Updated TravisCI to Python 3.11 pillow-wheels#345
  • this is base Python, we use Docker for building wheels

(3.10 issue for comparison: #5569)