Bump codecov/codecov-action from 1 to 2.0.3 (#116)

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 1 to 2.0.3.
- [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...v2.0.3)

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

Signed-off-by: dependabot[bot] <[email protected]>

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

.github/workflows/ci.yaml

@@ -49,7 +49,7 @@ jobs:
  run: |
  pytest -n auto --cov=./ --cov-report=xml
  - name: Upload code coverage to Codecov
- uses: codecov/codecov-action@v1
+ uses: codecov/codecov-action@v2.0.3
  with:
  file: ./coverage.xml
  flags: unittests