Update pythonapp.yml

.github/workflows/pythonapp.yml

@@ -25,7 +25,7 @@ jobs:
         python -m pip install --upgrade pip
         pip install pip-tools
         if [ -f requirements.txt ]; then pip-sync requirements.txt dev-requirements.txt; fi
-        sudo apt-get install -y build-essential dcmtk inetutils-ping libqt5core5a
+        sudo apt-get install -y build-essential dcmtk inetutils-ping libqt5core5a redis
         pip install flake8 pytest pytest-asyncio
     - name: Lint with flake8
       run: |