build(deps): bump codecov/codecov-action from 1.5.2 to 2.1.0

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 1.5.2 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](codecov/codecov-action@v1.5.2...v2.1.0)

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

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

.github/workflows/tests.yml

@@ -38,4 +38,4 @@ jobs:
         run: npm run test:ci
 
       - name: Coverage report
-        uses: codecov/codecov-action@v1.5.2
+        uses: codecov/codecov-action@v2.1.0