updating unit-test.yml

Author: Fiona-Waters

.github/workflows/unit-tests.yml

@@ -20,6 +20,7 @@ jobs:
           pip3 install poetry
           poetry lock --no-update
           poetry install --with test
+          pip install executing
       - name: Test with pytest and check coverage
         run: |
           coverage run -m --source=src pytest -v tests/unit_test.py