Merge pull request #25 from Fifciu/feat/#24-thumbnail_src

It adds thumbnail src

Author: thebatclaudio

wp-rest-api-v2-menus.php

@@ -145,6 +145,9 @@ function wp_api_v2_menus_get_menu_items( $id ) {
 			// add slug to menu items
 			$slug = basename( get_permalink($item->object_id) );
 			$item->slug = $slug;
+			if (isset($item->thumbnail_id) && $item->thumbnail_id) {
+				$item->thumbnailSrc = wp_get_attachment_image_url($item->thumbnail_id, 'post-thumbnail');
+			}
 		} else if($item->type == 'taxonomy') {
 			$cat = get_term($item->object_id);
 			$item->slug = $cat->slug;