Allow upgrading to Symfony 4
Allow upgrading to Symfony 4

aurelien-vtech/SonataDoctrineORMAdminBundle,aurelien-vtech/SonataDoctrineORMAdminBundle,pulzarraider/SonataDoctrineORMAdminBundle,aurelien-vtech/SonataDoctrineORMAdminBundle,sonata-project/SonataDoctrineORMAdminBundle,pulzarraider/SonataDoctrineORMAdminBundle,pulzarraider/SonataDoctrineORMAdminBundle