install setuptools for test

Author: lexdene

.github/workflows/test.yml

@@ -21,7 +21,7 @@ jobs:
         python-version: ${{ matrix.pyver }}
     - name: Install python dependencies
       run: |
-        python -m pip install --upgrade pip
+        python -m pip install --upgrade pip setuptools
         pip install 'Cython' 'tox<4'
 
     - name: Run unittest