Pull request #3439: KERNEL-14240 fix: deepExtend 为 undefined

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

* commit '821f194207f1fbc5514c287101a63a1075b099ac':
  KERNEL-14240 fix: deepExtend 为 undefined

src/core/2.base.js

@@ -640,7 +640,7 @@ export function isPromise(obj) {
 }
 
 export const deepClone = BI._.cloneDeep;
-export const deepExtend = BI._.deepExtend;
+export const deepExtend = BI._.merge;
 
 export function isDeepMatch(object, attrs) {
     const attrsKeys = keys(attrs), length = attrsKeys.length;