Your requirements could not be resolved to an installable set of packages. Problem 1 - orchestra/testbench[v6.23.0, ..., 6.x-dev] require phpunit/phpunit ^8.5.21 || ^9.5.10 -> found phpunit/phpunit[8.5.21, ..., 8.5.x-dev, 9.5.10, ..., 9.6.x-dev] but it conflicts with your root composer.json require (^10.0). - Root composer.json requires orchestra/testbench ^6.23 -> satisfiable by orchestra/testbench[v6.23.0, ..., 6.x-dev].

Process completed with exit code 2.

Your requirements could not be resolved to an installable set of packages. Problem 1 - orchestra/testbench[v6.23.0, ..., 6.x-dev] require phpunit/phpunit ^8.5.21 || ^9.5.10 -> found phpunit/phpunit[8.5.21, ..., 8.5.x-dev, 9.5.10, ..., 9.6.x-dev] but it conflicts with your root composer.json require (^10.0). - Root composer.json requires orchestra/testbench ^6.23 -> satisfiable by orchestra/testbench[v6.23.0, ..., 6.x-dev].

Process completed with exit code 2.

Your requirements could not be resolved to an installable set of packages. Problem 1 - orchestra/testbench[v7.0.0, ..., 7.x-dev] require phpunit/phpunit ^9.5.10 -> found phpunit/phpunit[9.5.10, ..., 9.6.x-dev] but it conflicts with your root composer.json require (^10.0). - Root composer.json requires orchestra/testbench 7.* -> satisfiable by orchestra/testbench[v7.0.0, ..., 7.x-dev].

Process completed with exit code 2.

Your requirements could not be resolved to an installable set of packages. Problem 1 - orchestra/testbench[v7.0.0, ..., 7.x-dev] require phpunit/phpunit ^9.5.10 -> found phpunit/phpunit[9.5.10, ..., 9.6.x-dev] but it conflicts with your root composer.json require (^10.0). - Root composer.json requires orchestra/testbench 7.* -> satisfiable by orchestra/testbench[v7.0.0, ..., 7.x-dev].