Update cibuildwheel version

Author: delivrance

.github/workflows/wheels.yml

@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.2.0a1
+        uses: pypa/cibuildwheel@v2.3.1
         env:
           CIBW_ARCHS_MACOS: "x86_64 universal2 arm64"
           CIBW_TEST_REQUIRES: tox