Pull request #3581: update

Merge in VISUAL/fineui from ~DAILER/fineui:es6 to es6

* commit 'f887e9dfbd94e460587526a188ac87b7f8250a16':
  update

packages/fineui/typescript/core/base.ts

@@ -400,6 +400,8 @@ export declare function getDate(...args: (number | string)[]): Date;
 
 export declare function getTime(...args: any[]): number;
 
+export declare function clamp(number: number, lower: number, upper: number): number;
+
 /**
  * 判断一个对象是不是promise
  * @param obj 对象