Attempt to fix tests

.github/workflows/build-and-test.yml

@@ -28,7 +28,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install scikit-build cmake cython pytest
+          pip install scikit-build cmake cython pytest pytest-cov
       - name: Install package
         working-directory: ./FaCT++.Python
         run: |