Bump clue/block-react from 1.2.0 to 1.3.0

Bumps [clue/block-react](https://github.com/clue/php-block-react) from 1.2.0 to 1.3.0.
- [Release notes](https://github.com/clue/php-block-react/releases)
- [Changelog](https://github.com/clue/reactphp-block/blob/master/CHANGELOG.md)
- [Commits](clue/reactphp-block@v1.2.0...v1.3.0)

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Author: dependabot-support