Update pythonpackage.yml

.github/workflows/pythonpackage.yml

@@ -35,7 +35,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install -r requirements.txt --upgrade
-        pip install -U pip coverage codecov flake8 fastimport pylint
+        pip install pip coverage codecov flake8 fastimport pylint --upgrade
     - name: Install mypy
       run: |
         pip install -U mypy