The job was canceled because "_7_3_prefer-lowest_ubuntu" failed.

Your requirements could not be resolved to an installable set of packages. Problem 1 - phpunit/phpunit[9.5.0, ..., 9.6.17] require php >=7.3 -> your php version (7.2.34) does not satisfy that requirement. - Root composer.json requires phpunit/phpunit ^9.5 -> satisfiable by phpunit/phpunit[9.5.0, ..., 9.6.17].

Process completed with exit code 2.