Your requirements could not be resolved to an installable set of packages. Problem 1 - phpunit/php-timer[2.0.0, ..., 2.1.2] require php ^7.1 -> your php version (7.0.33) does not satisfy that requirement. - phpunit/php-timer[2.1.3, ..., 2.1.x-dev] require php >=7.1 -> your php version (7.0.33) does not satisfy that requirement. - phpunit/php-timer[3.0.0, ..., 3.1.4, 4.0.0, 5.0.0] require php ^7.3 -> your php version (7.0.33) does not satisfy that requirement. - phpunit/php-timer 5.0.1 requires php ^7.3 || ^8.0 -> your php version (7.0.33) does not satisfy that requirement. - phpunit/php-timer[5.0.2, ..., 5.0.3] require php >=7.3 -> your php version (7.0.33) does not satisfy that requirement. - phpunit/php-timer[6.0.0, ..., 6.0.x-dev] require php >=8.1 -> your php version (7.0.33) does not satisfy that requirement. - phpunit/php-timer[7.0.0, ..., 7.0.x-dev] require php >=8.2 -> your php version (7.0.33) does not satisfy that requirement. - phpunit/php-timer[8.0.0, ..., 8.0.x-dev] require php >=8.3 -> your php version (7.0.33) does not satisfy that requirement. - Root composer.json requires phpunit/php-timer ^2.0.0 || ^3.0.0 || ^4.0.0 || ^5.0.0 || ^6.0.0 || ^7.0.0 || ^8.0.0 -> satisfiable by phpunit/php-timer[2.0.0, ..., 2.1.x-dev, 3.0.0, ..., 3.1.4, 4.0.0, 5.0.0, 5.0.1, 5.0.2, 5.0.3, 6.0.0, 6.0.x-dev, 7.0.0, 7.0.1, 7.0.x-dev, 8.0.0, 8.0.x-dev].