Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires phpunit/phpunit ^11.0 -> satisfiable by phpunit/phpunit[11.0.0, ..., 11.5.2]. - phpunit/phpunit[11.0.0, ..., 11.5.2] require php >=8.2 -> your php version (8.1.31) does not satisfy that requirement.

Process completed with exit code 2.