Upgrade pip and setuptools in workflow

Python 3.5 on GitHub Action ran into some certificate issue that newer
version of pip doesn't have, so upgrading to the latest by default.

Author: fantix

.github/workflows/tests.yml

@@ -62,6 +62,7 @@ jobs:
     - name: Install Python Deps
       if: steps.release.outputs.version == 0
       run: |
+        pip install -U pip setuptools
         pip install -e .[test]
 
     - name: Test
@@ -117,6 +118,7 @@ jobs:
     - name: Install Python Deps
       if: steps.release.outputs.version == 0
       run: |
+        pip install -U pip setuptools
         pip install -e .[test]
 
     - name: Test