Bump codecov/codecov-action from 1 to 1.5.0 (#88)

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 1 to 1.5.0.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/master/CHANGELOG.md)
- [Commits](codecov/codecov-action@v1...v1.5.0)

Signed-off-by: dependabot[bot] <support@github.com>

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

.github/workflows/main.yaml

@@ -45,7 +45,7 @@ jobs:
           python -m pytest --cov=./ --cov-report=xml --verbose
 
       - name: Upload code coverage to Codecov
-        uses: codecov/codecov-action@v1
+        uses: codecov/codecov-action@v1.5.0
         with:
           file: ./coverage.xml
           flags: unittests