Explicitly build PyPy wheels - cibuildwheel 2.21.3 -> 2.22.0 (#1339)

* per https://cibuildwheel.pypa.io/en/stable/options/#enable pypy will have to be manually enabled in cibuildwheel 3

* cibuildwheel==2.22.0

Author: Spitfire1900

.github/workflows/wheels.yml

@@ -32,7 +32,7 @@ jobs:
           platforms: all
 
       - name: Install cibuildwheel
-        run: python -m pip install cibuildwheel==2.21.3
+        run: python -m pip install cibuildwheel==2.22.0
 
       - name: Build wheels
         run: python -m cibuildwheel --output-dir wheelhouse

pyproject.toml

@@ -2,6 +2,7 @@
 requires = ["setuptools", "wheel"]
 
 [tool.cibuildwheel]
+enable = ["pypy"]
 skip = "*musllinux_aarch64 *musllinux_ppc64le"
 
 archs = ["auto"]