Bumps [react/promise](https://github.com/reactphp/promise) from 2.7.1 to 2.8.0.
- [Release notes](https://github.com/reactphp/promise/releases)
- [Changelog](https://github.com/reactphp/promise/blob/v2.8.0/CHANGELOG.md)
- [Commits](https://github.com/reactphp/promise/compare/v2.7.1...v2.8.0)

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

• Commit a7eb693
• #26: Bump react/promise from 2.7.1 to 2.8.0
• Branch master

dependabot[bot]