Update workflows

Author: fsbraun

.github/workflows/lint.yml

@@ -14,7 +14,7 @@ jobs:
         with:
           python-version: 3.9
       - name: Install flake8
-        run: pip install --upgrade flake8
+        run: pip install --upgrade flake8 flake8-pytest
       - name: Run flake8
         uses: liskin/gh-problem-matcher-wrap@v1
         with:

.github/workflows/test.yml

@@ -40,6 +40,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install -r tests/requirements/${{ matrix.requirements-file }}
+        pip install setuptools
         python setup.py install
 
     - name: Run test coverage