Bump codecov/codecov-action from 2.0.3 to 2.1.0

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 2.0.3 to 2.1.0.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/master/CHANGELOG.md)
- [Commits](https://github.com/codecov/codecov-action/compare/v2.0.3...v2.1.0)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/test.yaml

@@ -59,7 +59,7 @@ jobs:
           cat flake8.output | reviewdog -reporter=github-pr-check -f=flake8 -name="flake8"
 
       - name: Upload coverage
-        uses: codecov/codecov-action@v2.0.3
+        uses: codecov/codecov-action@v2.1.0
         if: ${{ matrix.py_version == '3.9' }}
 
       - name: Publish Test Atrifact