Install all requirements during build

.github/workflows/python-package.yml

@@ -22,7 +22,8 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install black mypy
+        python -m pip install -r requirements.txt
+        python -m pip install -r requirements-dev.txt
     - name: Check code formatting
       run: |
         black --check .