See Github issue #6661 ( github.com/composer/composer/issues/6661 ).
When `with-all-dependencies` is used, Composer\Installer::whitelistUpdateDependencies should update all whitelisted dependencies, even if the dependency is a root requirement.
When `--with-all-dependencies` is used, Composer\Installer::whitelistUpdateDependencies should update the dependencies of all whitelisted packages, even if the dependency is a root requirement.