chore: fix allowSyntheticDefaultImports define

                   ref ant-design/ant-design#26484

Author: zombieJ

src/PopupInner.tsx

@@ -1,4 +1,4 @@
-import React from 'react';
+import * as React from 'react';
 
 interface PopupInnerProps {
   prefixCls: string;

src/context.ts

@@ -1,4 +1,4 @@
-import React from 'react';
+import * as React from 'react';
 
 interface TriggerContextProps {
   onPopupMouseDown: React.MouseEventHandler<HTMLElement>;

src/mock.tsx

@@ -1,4 +1,4 @@
-import React from 'react';
+import * as React from 'react';
 import { generateTrigger } from './index';
 
 interface MockPortalProps {