Ensure up to date setuptools when running build.

Author: mcmtroffaes

.github/workflows/build.yml

@@ -56,7 +56,7 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip
+        python -m pip install --upgrade pip setuptools
         python -m pip install pytest codecov coverage
         python -m pip install . sphinx-autoapi ${{ matrix.pip-sphinx }}
     - name: Install extra dependencies