Update pypa/cibuildwheel tov2.21.3

Author: zfergus

.github/workflows/pypi.yml

@@ -40,14 +40,14 @@ jobs:
       - uses: actions/[email protected]
 
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.19.2
+        uses: pypa/cibuildwheel@v2.21.3
         # to supply options, put them in 'env', like:
         env:
           MACOSX_DEPLOYMENT_TARGET: "11.0"
           CIBW_ARCHS: auto64
           CIBW_ARCHS_MACOS: ${{ matrix.arch }}
           CIBW_BUILD: ${{ matrix.python-version }}-*
-          CIBW_SKIP: "cp36-* cp37-* pp* *musllinux* *manylinux1* *-win32 *linux_i686 *linux_aarch64 *linux_ppc64le *linux_s390x"
+          CIBW_SKIP: "cp36-* cp37-* cp38-* pp* *musllinux* *manylinux1* *-win32 *linux_i686 *linux_aarch64 *linux_ppc64le *linux_s390x"
 
       - uses: actions/upload-artifact@v3
         with: