Update cibuildwheel

We need pypa/cibuildwheel#1915 to `yum install`

Author: eriknw

.github/workflows/wheels.yml

@@ -147,7 +147,7 @@ jobs:
           brew fetch --retry libomp && brew reinstall libomp
           echo MACOSX_DEPLOYMENT_TARGET=$(otool -l $(brew --prefix libomp)/lib/libomp.dylib | grep minos | awk '{print $2}') >> $GITHUB_ENV
 
-      - uses: pypa/cibuildwheel@v2.18
+      - uses: pypa/cibuildwheel@v2.21.3
         with:
           output-dir: wheelhouse
         env:

pyproject.toml

@@ -1,6 +1,7 @@
 [build-system]
 build-backend = "setuptools.build_meta"
 requires = [
+    # setuptools<74 until PyPy vendors cffi 1.15.1
     "setuptools >=64, <74",
     "setuptools-git-versioning",
     "wheel",