Build(deps): Bump pypa/cibuildwheel from 4.2.0 to 4.2.1

[dependabot]

Bumps pypa/cibuildwheel from 4.2.0 to 4.2.1.

Release notes

Sourced from pypa/cibuildwheel's releases.

v4.2.1

• 🐛 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)

Changelog

Sourced from pypa/cibuildwheel's changelog.

v4.2.1

5 September 2026

• 🐛 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)

Commits

• e090b81 Bump version: v4.2.1
• 59501f4 Respect configured NuGet package sources (#2966)
• 885ead0 [Bot] Update dependencies (#2985)
• 3d9e8c5 docs: refresh CircleCI and CPython platform links (#2977)
• 7d5ec95 [Bot] Update dependencies (#2981)
• a007eed [Bot] Update dependencies (#2976)
• fdda545 chore(deps): bump astral-sh/setup-uv from 9.0.0 to 10.0.1 in the actions grou...
• 8832cf6 chore(deps): bump actions/attest-build-provenance from 4.1.1 to 4.2.2 in the ...
• a35209b [Bot] Update dependencies (#2970)
• 148ea70 chore: faster and stricter mypy (#2968)
• Additional commits viewable in compare view

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.54%. Comparing base (9c4327e) to head (856078b).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #719   +/-   ##
=======================================
  Coverage   99.54%   99.54%           
=======================================
  Files         101      101           
  Lines       17428    17428           
  Branches     1430     1430           
=======================================
  Hits        17349    17349           
  Misses         29       29           
  Partials       50       50           

Flag	Coverage Δ
adder	99.52% <ø> (ø)
subtractor	99.52% <ø> (ø)

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