install setuptools in ci

.github/workflows/runpyci.yml

@@ -21,6 +21,7 @@ jobs:
       - name: Install dependencies and linters
         run: |
           [ -e requirements.txt ] && pip install -r requirements.txt
+          pip install setuptools  # CUSTOM: required until we move to pyproject
           pip install pycodestyle pyupgrade pyflakes dlint pylint ruff
       - name: Run tests
         env: