Fix missing API document of Menu[multiple]

components/menu/index.en-US.md

@@ -40,6 +40,7 @@ More layout and samples: [layout](/docs/spec/layout).
 | onClick | callback of the clicked menu item, params: {item, key, keyPath} | function | - |
 | style | style of the root node | object | |
 | inlineIndent | indent px of inline menu item on each level | number | 24 |
+| multiple | Allow select multiple item | boolean | false |
 
 > More options in [rc-menu](https://github.com/react-component/menu#api)
 

components/menu/index.tsx

@@ -20,35 +20,24 @@ export interface ClickParam {
 
 export interface MenuProps {
   id?: string;
-  /** 主题颜色*/
+  /** `light` `dark` */
   theme?: 'light' | 'dark';
-  /** 菜单类型  enum: `vertical` `horizontal` `inline`*/
+  /** enum: `vertical` `horizontal` `inline` */
   mode?: 'vertical' | 'horizontal' | 'inline';
-  /** 当前选中的菜单项 key 数组*/
   selectedKeys?: Array<string>;
-  /** 初始选中的菜单项 key 数组*/
   defaultSelectedKeys?: Array<string>;
-  /** 当前展开的菜单项 key 数组*/
   openKeys?: Array<string>;
-  /** 初始展开的菜单项 key 数组*/
   defaultOpenKeys?: Array<string>;
   onOpenChange?: (openKeys: string[]) => void;
-  /**
-   * 被选中时调用
-   *
-   * @type {(item: any, key: string, selectedKeys: Array<string>) => void}
-   */
   onSelect?: (param: SelectParam) => void;
-  /** 取消选中时调用*/
   onDeselect?: (param: SelectParam) => void;
-  /** 点击 menuitem 调用此函数*/
   onClick?: (param: ClickParam) => void;
-  /** 根节点样式*/
   style?: React.CSSProperties;
   openAnimation?: string | Object;
   openTransitionName?: string | Object;
   className?: string;
   prefixCls?: string;
+  multiple?: boolean;
 }
 
 export default class Menu extends React.Component<MenuProps, any> {

components/menu/index.zh-CN.md

@@ -41,6 +41,7 @@ subtitle: 导航菜单
 | onClick | 点击 menuitem 调用此函数，参数为 {item, key, keyPath} | function | - |
 | style | 根节点样式 | object | |
 | inlineIndent | inline 模式的菜单缩进宽度 | number | 24 |
+| multiple | 是否允许多选 | boolean | false |
 
 > More options in [rc-menu](https://github.com/react-component/menu#api)