Bump codecov/codecov-action from 2.0.1 to 2.0.3

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 2.0.1 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@v2.0.1...v2.0.3)

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

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

Author: dependabot[bot]

.github/workflows/tests.yml

@@ -45,4 +45,4 @@ jobs:
 
     - name: Upload coverage to Codecov
       if: ${{ matrix.update-coverage }}
-      uses: codecov/codecov-action@v2.0.1
+      uses: codecov/codecov-action@v2.0.3