Bump @testing-library/react from 10.4.7 to 10.4.8

Bumps [@testing-library/react](https://github.com/testing-library/react-testing-library) from 10.4.7 to 10.4.8.
- [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@v10.4.7...v10.4.8)

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