Enable finding python 3.7

Author: MHendricks

.github/actions/setup-tox/action.yml

@@ -48,7 +48,9 @@ runs:
 
     - name: Install dependencies
       shell: bash
+      # NOTE: The virtualenv and tox requirements support finding python 3.7,
+      # if we drop support for python 3.7 the reqs can be simplified and updated
       run: |
         python --version
         python -m pip install --upgrade pip
-        python -m pip install tox
+        python -m pip install "tox<=4.23.2" "virtualenv<=20.26.6"