Fixed CI

.github/workflows/python-app.yml

@@ -20,7 +20,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install pytest
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+        if [ -f requirements-dev.txt ]; then pip install -r requirements-dev.txt; fi
     - name: Test with pytest
       run: |
         python -m pytest tests/unit --cov=. --cov-report html --cov-report term