Removed references to travis

moved from python -m pip upgrade to straight pip upgrade for 3.5 not working

Author: Zak Zajac

.github/workflows/build.yml

@@ -22,7 +22,7 @@ jobs:
 
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip
+          pip install --upgrade pip
           pip install tox tox-gh-actions
 
       - name: Test with tox