Use response type instead of request type to set the requireView default value.

When you set a specific type for response, the responder still set the requireView according the request.
So you need to deal with the handler which manage two type of datas.

```php
Media::type($id, $type, [
    'cast' => false,
    'encode' => function($data) {
        /*
        //Shouldn't be needed.
        if (isset($data['file']) && isset($data['file']->file) && is_object($data['file']->file)) {
            return $data['file']->file->getBytes();
        }
        */
        return (isset($data['file'])) ? $data['file']->getBytes() : null;
    },
    'decode' => function($file) {
        return compact('file');
    }
]);
```