Add filter for being able to change the posts that are suggested

Currently when a case is submitted it shows suggested posts, which is great. Could you update your code to allow for the parameters that are passed into WP_Query to be filtered?

The use case is we have a post type of knowledge base, and we only want to show posts with that post_type.

E.g.
wp-content/plugins/fusedesk/fusedesk.php (Line 616)

Change:
$query = new WP_Query($search_query);

To:

$query = new WP_Query(apply_filters('fusedesk_ajax_search_query', $search_query));

Thanks,
Rob