⬆️ deps(github-actions): update pypa/cibuildwheel action to v4.2.1

[Open-Source-Bot]

This PR contains the following updates:

Package	Type	Update	Change
pypa/cibuildwheel	action	minor	v4.0.0 → v4.2.1

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Release Notes

pypa/cibuildwheel (pypa/cibuildwheel)

v4.2.1

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• 🐛 Respects the NuGet package sources configured on the machine when installing CPython on Windows, instead of always falling back to nuget.org (#​2966)
• 🐛 Fixes a NameError on Pyodide when an already-compatible wheel was reused, which made the test step fail (#​2968)
• 🛠 Updates the Android Python versions, and the Android testbed's Gradle version, making it compatible with Java 25 (#​2962)
• 🛠 Updates dependencies including CPython 3.15.0rc2 (#​2965, #​2970, #​2976, #​2981, #​2985)

v4.2.0

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• 🌟 CPython 3.15 wheels are now built by default - without the "cpython-prerelease" enable set. It's time to build and upload these wheels to PyPI! This release includes CPython 3.15.0rc1, which is guaranteed to be ABI compatible with the final release. (#​2944)
• ✨ Adds Pyodide 3.15 support with the cp315-pyodide_wasm32 build identifier, using Pyodide 315.0.0a2. These are also stable wrt. the final release. (#​2958)
• 🐛 Retries a failed download six times with exponential backoff, so short network outages no longer stop a build. A 4xx response is still reported at once. (#​2953)
• 🐛 Accepts default as a build-frontend value on Pyodide, and accepts pyodide-build in the top-level table and in overrides (#​2951)
• 🛠 Holds pip back on GraalPy, where newer pip breaks the build (#​2955)
• 🛠 Updates Pyodide to 314.0.4 (#​2949, #​2952)
• 🛠 Updates dependencies and container pins (#​2952, #​2960)
• 💼 Updates CI action pins (#​2948, #​2954)
• 🧪 Uses pp311 for the abi3 test, and deletes test_overridden_pip_constraint, which is not necessary since #​2583 (#​2956, #​2957)

v4.1.1

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• ✨ Adds pyodide-build as a separate build-frontend, now the default frontend for Pyodide, with verbosity flags handling. Any other frontend is ignored with a warning on Pyodide. (#​2609, #​2945)
• 🔐 Uses digests instead of tags for pinned container images, strengthening supply-chain security. The human-readable tags remain as comments in pinned_docker_images.cfg. (#​2915)
• 🐛 Fixes platform-specific test-runtime environment variables (e.g. CIBW_TEST_RUNTIME_ANDROID) not being honored (#​2941)
• 🐛 Fixes quoting of test-requires and audit-requires so PEP 508 specifiers containing spaces work (#​2913)
• 🐛 Makes archs parsing case-insensitive and platform-aware, so e.g. arm64 works on Windows (#​2920)
• 🐛 Uses an absolute path for the {project} placeholder in config-settings (#​2934)
• 🐛 Validates the pyodide-version option against the build identifier with a clear error (#​2925)
• 🐛 Fixes PyPy installs on macOS after PyPy switched its downloads from .tar.bz2 to .tar.gz (#​2939)
• 🐛 Makes a matching python3-config available in the build and test venvs on macOS (#​2922)
• 🛠 Updates dependencies and container pins (#​2917, #​2935, #​2939)
• 🛠 Updates Android tests to current Python versions and the new test repository URL (#​2933)
• 🛠 Drops the orjson dependency, no longer used by mypy 2+ (#​2923)
• 📚 Builds the docs with properdocs, a MkDocs fork (#​2946)
• 📚 Adds the missing cp314-pyodide_wasm32 entry to the build identifier table (#​2947)
• 📚 Removes outdated notes about the pip wheel build frontend and ClearLinux (#​2926)
• 💼 Adds a "CI: PyPy EoL" PR label to run PyPy EoL tests on PRs (#​2930)
• 💼 Updates CI action pins and pre-commit hooks (#​2914, #​2932, #​2938, #​2940, #​2942, #​2943)

v4.1.0

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• ✨ Updates Pyodide to the final 314.0.0 release, so Pyodide 3.14 wheels now build by default without the pyodide-prerelease enable flag. (#​2906)
• 🐛 Raises clear errors when a build produces no wheel, instead of failing later with a confusing message (#​2909)
• 🛠 Speeds up CLI startup through lazy imports on Python 3.15 (#​2797)
• 📚 Adds an FAQ section on caching cibuildwheel's downloaded tools with CIBW_CACHE_PATH (#​2842)
• 📚 Documentation improvements: clarifies which shell is used for command options, clarifies environment variable precedence, and fixes a dead Pyodide env info link (#​2904, #​2905, #​2911)

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