Pull request #1703: 无JIRA任务 类型修改

Merge in VISUAL/fineui from ~TELLER/fineui:bugfix to master

* commit 'c0007393e960747c7033c3a1d57f88a4a88e2a81':
  fix: 类型修改

typescript/widget/yearmonth/popup.yearmonth.ts

@@ -7,7 +7,7 @@ export declare class DynamicYearMonthPopup extends Widget {
     static BUTTON_OK_EVENT_CHANGE: string;
     static EVENT_CHANGE: string;
 
-    setMinDate(minDate: string): void;
+    setMinDate(minDate?: string): void;
 
-    setMaxDate(maxDate: string): void;
+    setMaxDate(maxDate?: string): void;
 }