Bump @testing-library/react from 10.2.1 to 10.3.0 (#176)

Bumps [@testing-library/react](https://github.com/testing-library/react-testing-library) from 10.2.1 to 10.3.0.
- [Release notes](https://github.com/testing-library/react-testing-library/releases)
- [Changelog](https://github.com/testing-library/react-testing-library/blob/master/CHANGELOG.md)
- [Commits](testing-library/react-testing-library@v10.2.1...v10.3.0)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>