attempt to fix codecov upload (#138)

Author: akaszynski

.github/workflows/testing-and-deployment.yml

@@ -200,7 +200,7 @@ jobs:
         run: pytest -v tests/ --durations=0
 
       - uses: codecov/codecov-action@v2
-        if: ${{ runner.os == 'Linux' && runner.python-version == '3.9' }}
+        if: ${{ runner.os == 'Linux' && matrix.python-version == '3.9' }}
         name: 'Upload coverage to Codecov'
 
       - name: Upload wheel