Bump codecov/codecov-action from 1 to 2.1.0

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 1 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...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] <[email protected]>

.github/workflows/test.yml

@@ -59,6 +59,6 @@ jobs:
       run: |
         #./generate_test_coverage.sh --print-coverage
         bash <(curl -s https://codecov.io/bash) -f
-    - uses: codecov/codecov-action@v1
+    - uses: codecov/codecov-action@v2.1.0
       with:
         files: ./coveralls.json