Merge pull request DefinitelyTyped#8094 from use-strict/patch-2

jqueryui - optional options for serialize method

Author: johnnyreilly

jqueryui/jqueryui.d.ts

@@ -1704,7 +1704,7 @@ interface JQuery {
     sortable(methodName: string): JQuery;
     sortable(options: JQueryUI.SortableOptions): JQuery;
     sortable(optionLiteral: string, optionName: string): any;
-    sortable(methodName: 'serialize', options: { key?: string; attribute?: string; expression?: RegExp }): string;
+    sortable(methodName: 'serialize', options?: { key?: string; attribute?: string; expression?: RegExp }): string;
     sortable(optionLiteral: string, options: JQueryUI.SortableOptions): any;
     sortable(optionLiteral: string, optionName: string, optionValue: any): JQuery;