Your requirements could not be resolved to an installable set of packages.
Problem 1
- Root composer.json requires php ^8.1|^8.2|^8.3 but your php version (7.4.33) does not satisfy that requirement.
Problem 2
- orchestra/testbench[v5.0.0, ..., v5.17.1] require phpunit/phpunit ^8.4 || ^9.0 -> found phpunit/phpunit[8.4.0, ..., 8.5.39, 9.0.0, ..., 9.6.20] but it conflicts with your root composer.json require (^10.0|^11.0).
- orchestra/testbench[v5.18.0, ..., v5.20.0] require phpunit/phpunit ^8.4 || ^9.3.3 -> found phpunit/phpunit[8.4.0, ..., 8.5.39, 9.3.3, ..., 9.6.20] but it conflicts with your root composer.json require (^10.0|^11.0).
- Root composer.json requires orchestra/testbench 5.* -> satisfiable by orchestra/testbench[v5.0.0, ..., v5.20.0].