attempt to fix continuous integration

.github/workflows/pythonapp.yml

@@ -57,7 +57,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install flake8 pytest
-        pip ./setup.py install
+        python ./setup.py install
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names