Forgot to add to the Site interface.

src/interfaces/source.ts

@@ -56,6 +56,7 @@ export interface Site {
   application_question?: string;
   private_instance: boolean;
   default_theme: string;
+  default_post_listing_type: string;
   actor_id: string;
   last_refreshed_at: string;
   inbox_url: string;