Try 4 on cibuildwheel test

Author: harripd

.github/workflows/build_wheels.yml

@@ -14,15 +14,16 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
-      - name: install pytest
-        run: python -m pip install pytest
+        #      - name: install pytest
+        #        run: python -m pip install pytest
 
       - name: Build wheels
         uses: pypa/cibuildwheel@v2.2.2
         # to supply options, put them in 'env', like:
         env:
          CIBW_SKIP: '*musllinux* pp*'
          CIBW_TEST_REQURES: pytest, numpy==1.20.1
+         CIBW_BEFORE_TEST: python -m pip install pytest
          CIBW_TEST_COMMAND: python -m pytest {package}/tests
       - uses: actions/upload-artifact@v2
         with: