Update symfony/yaml requirement from ^3.0 || ^4.0 || ^5.0 || ^6.0 to ^3.0 || ^4.0 || ^5.0 || ^6.0 || ^7.0

Update symfony/yaml requirement from ^3.0 || ^4.0 || ^5.0 || ^6.0 to ^3.0 || ^4.0 || ^5.0 || ^6.0 || ^7.0 #24