Not installable with a Symfony 6 project

**PHP version**: 8.0+

**Description**
This library requires symfony/options-resolver on version 5.* or below, but Symfony 6.0 has been released 1 month ago.

**How to reproduce**
Use this library with a project build on Symfony 6.0

**Possible Solution**
Update composer.json to support also `symfony/options-resolver` with the version 6.0
