don't need to force a python version

Author: mcflugen

.github/workflows/test.yml

@@ -40,7 +40,7 @@ jobs:
       - name: Test
         run: |
           pip install nox
-          nox -s test --force-pythons="${{ matrix.python-version }}"
+          nox -s test
 
       - name: Run bmi-test
         run: |