Update Codecov action to v4 (ev-flow#627)

Author: sidra-asa

.github/workflows/pytest.yml

@@ -58,11 +58,12 @@ jobs:
       run: |
         python -m pip install black pytest sphinx sphinx-rtd-theme
         python -m pip install coveralls pytest-cov
-        pytest --cov=./
+        pytest --cov=./ --cov-report=xml
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
-        flags: unittests
         fail_ci_if_error: true
+        flags: unittests
+        token: ${{ secrets.CODECOV_TOKEN }}
 

codecov.yml

@@ -1,2 +1,2 @@
 ignore:
-  - "*/tests/*”
+  - "*/tests/*"