Update testing workflows

Author: jvsguerra

.github/workflows/integration-testing.yml

@@ -31,4 +31,4 @@ jobs:
 
       - name: Test with pytest
         run: |
-          pytest tests/integration -v
+          pytest tests/integration -v --import-mode=importlib

.github/workflows/unit-testing.yml

@@ -30,4 +30,4 @@ jobs:
 
       - name: Test with pytest
         run: |
-          pytest tests/unit -v
+          pytest tests/unit -v --import-mode=importlib