specify pip~=22.1 because of pypa/pip#11294

.github/workflows/tests.yml

@@ -17,7 +17,7 @@ jobs:
 
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip
+        python -m pip install pip~=22.1
         python -m pip install -e '.[test]'
     - name: Run tests
       run: pytest --cov --cov-report=term-missing