Bump react/child-process from 0.6.0 to 0.6.1
Bump react/child-process from 0.6.0 to 0.6.1

Bumps [react/child-process](https://github.com/reactphp/child-process) from 0.6.0 to 0.6.1.
- [Release notes](https://github.com/reactphp/child-process/releases)
- [Changelog](https://github.com/reactphp/child-process/blob/master/CHANGELOG.md)
- [Commits](https://github.com/reactphp/child-process/compare/v0.6.0...v0.6.1)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
WyriHaximus/reactphp-child-process-promise