Make sure that PHPUnit 5.3 does not pull in PHPUnit 5.4 dependencies
Make sure that PHPUnit 5.3 does not pull in PHPUnit 5.4 dependencies

duncan3dc/phpunit,didiwuliu/phpunit,DonaldKellett/phpunit,Firehed/phpunit,luomor/phpunit,OndraM/phpunit,sebastianbergmann/phpunit,tronsha/phpunit