Imported interfaces are marked as unused when used for constant

[danez]

This is a similar issue like #51 which was fixed in 5d27c04, but in this case it is interfaces which are marked as unused when used as constant in a annotation.

use rg\core\graphql\relay\NodeInterface;

/**
 * @Query(
 *     type=NodeInterface::class
 * )
 */
class NodeQuery implements GraphQLQueryInterface {}

The use statement in this example is marked unused assuming NodeInterface is an interface and not a class.

I haven't checked if traits have the same problem but maybe also traits should be considered in this issue

[Haehnchen]

done