Bump react from 16.8.1 to 16.12.0 Bumps [react](https://github.com/facebook/react/tree/HEAD/packages/react) from 16.8.1 to 16.12.0. - [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/v16.12.0/packages/react) Signed-off-by: dependabot-preview[bot]