Uncomment pytest step in CI workflow for testing

Author: BrunoV21

.github/workflows/python_package.yml

@@ -43,8 +43,8 @@ jobs:
         run: |
           flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
           flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
-    #   - name: Test with pytest
-    #     run: pytest tests/
+      - name: Test with pytest
+        run: pytest tests/
   security:
     name: Security Check
     runs-on: ubuntu-latest