fix: import type usage

Author: afc163

src/interface.ts

@@ -2,7 +2,7 @@ import type { CSSMotionProps } from 'rc-motion';
 import type React from 'react';
 import type { TabNavListProps } from './TabNavList';
 import type { TabPaneProps } from './TabPanelList/TabPane';
-import { DropdownProps } from 'rc-dropdown/lib/Dropdown';
+import type { DropdownProps } from 'rc-dropdown/lib/Dropdown';
 
 export type TriggerProps = {
   trigger?: 'hover' | 'click';