Install setuptools explicitly

.github/workflows/python-test-lint.yml

@@ -22,7 +22,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install pytest flake8
+        python -m pip install pytest flake8 setuptools
         pip install -r requirements.txt
         python setup.py install
     - name: Lint with flake8