Bump codecov/codecov-action from 2.0.3 to 2.1.0 (#15)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -55,7 +55,7 @@ jobs:
           python -m pytest --cov=./ --cov-report=xml --verbose
 
       - name: Upload code coverage to Codecov
-        uses: codecov/codecov-action@v2.0.3
+        uses: codecov/codecov-action@v2.1.0
         with:
           file: ./coverage.xml
           flags: unittests