Added box cover filter to movies.

src/movies.js

@@ -287,6 +287,10 @@ async function queryManticoreSql(filters, options) {
 					builder.whereRaw('any(entity_ids) = ?', filters.entityId);
 				}
 
+				if (filters.requireCover) {
+					builder.where('has_cover', true);
+				}
+
 				if (typeof filters.isShowcased === 'boolean') {
 					builder.where('is_showcased', filters.isShowcased);
 				}