python: mypy in lint workflow

.github/workflows/lint-python.yml

@@ -27,8 +27,10 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install flake8
+          pip install mypy
+          pip install django-stubs
           if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
 
       - name: Lint Flake8
         run: |
-          flake8 --count --show-source --statistics
+          make lint