While universal2 wheels can be built on x86_64, the arm64 part of them cannot currently be tested. The ability to test the arm64 part of a universal2 wheel will be added in a future release of cibuildwheel, once Apple Silicon CI runners are widely available. To silence this warning, set `CIBW_TEST_SKIP: "*-macosx_universal2:arm64"`.

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v3, actions/setup-python@v4, actions/upload-artifact@v3. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.