Process completed with exit code 2.

Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires phpunit/phpunit ^9.6 -> satisfiable by phpunit/phpunit[9.6.0, ..., 9.6.x-dev]. - phpunit/phpunit[9.6.0, ..., 9.6.19] require sebastian/diff ^4.0.3 -> found sebastian/diff[4.0.3, ..., 4.0.x-dev] but the package is fixed to 5.1.1 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. - phpunit/phpunit[9.6.20, ..., 9.6.x-dev] require sebastian/diff ^4.0.6 -> found sebastian/diff[4.0.6, 4.0.x-dev] but the package is fixed to 5.1.1 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.

Process completed with exit code 1.