Merge pull request #28489 from zyh825/master

update typings for the 'react-rnd' package version 7.4

types/react-rnd/index.d.ts

@@ -2,6 +2,7 @@
 // Project: https://github.com/bokuweb/react-rnd
 // Definitions by: Ragg <https://github.com/Ragg->
 //                 fsubal <https://github.com/fsubal>
+//                 salieri <https://github.com/zyh825>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.8
 import * as React from "react";
@@ -100,6 +101,7 @@ export interface Options {
   maxWidth: number | string;
   maxHeight: number | string;
   z: number;
+  bounds: 'parent' | 'window' | 'body' | string;
   resizeHandleClasses: HandleClasses;
   resizeHandleStyles: HandleStyles;