Bump react-dom from 16.12.0 to 16.13.0

Bumps [react-dom](https://github.com/facebook/react/tree/HEAD/packages/react-dom) from 16.12.0 to 16.13.0.
- [Release notes](https://github.com/facebook/react/releases)
- [Changelog](https://github.com/facebook/react/blob/master/CHANGELOG.md)
- [Commits](https://github.com/facebook/react/commits/v16.13.0/packages/react-dom)

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