🐛解决依赖树中存在多个 babel 版本，导致样例代码报错的问题

Author: liyuan-meng

src/components/avatar/demos/basic-avatar.md

@@ -14,7 +14,7 @@ import React from 'react';
 import { Avatar, Icon } from 'cloud-react';
 import './style.less';
 
-export default class AvatarDemos extends React.Component {
+class AvatarDemos extends React.Component {
 
     render() {
       return (
@@ -54,5 +54,7 @@ export default class AvatarDemos extends React.Component {
       );
 	}
 }
+
+export default AvatarDemos;
 ```
 

src/components/avatar/demos/group-avatar.md

@@ -19,7 +19,7 @@ const styles = {
     gap: 5,
     marginBottom: 20
   };
-export default class AvatarDemos extends React.Component {
+class AvatarDemos extends React.Component {
 
     render() {
       return (
@@ -38,5 +38,6 @@ export default class AvatarDemos extends React.Component {
       );
 	}
 }
+export default AvatarDemos;
 ```
 

src/components/badge/demos/basic-badge.md

@@ -12,7 +12,7 @@ desc: 支持 message、number、dot 三种展示形式
 import React from 'react';
 import { Badge } from 'cloud-react';
 
-export default class BadgeDemos extends React.Component {
+class BadgeDemos extends React.Component {
   onClick = () => {
     console.log('lalala');
   };
@@ -51,4 +51,6 @@ export default class BadgeDemos extends React.Component {
     );
   }
 }
+
+export default BadgeDemos;
 ```

src/components/bread-crumbs/demos/basic-bread-crumbs.md

@@ -14,7 +14,7 @@ import React from 'react';
 import { BreadCrumbs, Button, Icon } from 'cloud-react';
 import './styles/basic-bread-crumbs.less'
 
-export default class BreadCrumbsDemo extends React.Component {
+class BreadCrumbsDemo extends React.Component {
     constructor(props) {
         super(props);
         this.state = {
@@ -85,5 +85,7 @@ export default class BreadCrumbsDemo extends React.Component {
 		);
 	}
 }
+
+export default BreadCrumbsDemo;
 ```
 

src/components/button/demos/basic-button.md

@@ -15,7 +15,7 @@ import { Button, InputNumber } from 'cloud-react';
 
 const blank = '\u00A0';
 
-export default class ButtonDemo extends React.Component {
+class ButtonDemo extends React.Component {
 	render() {
 		return (
 			<React.Fragment>
@@ -36,4 +36,6 @@ export default class ButtonDemo extends React.Component {
 		);
 	}
 }
+
+export default ButtonDemo;
 ```

src/components/button/demos/block.md

@@ -14,7 +14,7 @@ import { Button } from 'cloud-react';
 
 const blank = '\u00A0';
 
-export default class ButtonDemo extends React.Component {
+class ButtonDemo extends React.Component {
 	render() {
 		return (
 			<React.Fragment>
@@ -47,4 +47,6 @@ export default class ButtonDemo extends React.Component {
 		);
 	}
 }
+
+export default ButtonDemo;
 ```

src/components/button/demos/color-button.md

@@ -13,7 +13,7 @@ desc: 按钮三种颜色类型：tips（提示按钮）、danger（危险按钮
 import React from 'react';
 import { Button, InputNumber } from 'cloud-react';
 
-export default class ButtonDemo extends React.Component {
+class ButtonDemo extends React.Component {
 	render() {
 		return (
 			<ul>
@@ -63,4 +63,5 @@ export default class ButtonDemo extends React.Component {
 		);
 	}
 }
+export default ButtonDemo;
 ```

src/components/button/demos/disabled.md

@@ -15,7 +15,7 @@ import { Button } from 'cloud-react';
 
 const blank = '\u00A0';
 
-export default class ButtonDemo extends React.Component {
+class ButtonDemo extends React.Component {
 	render() {
 		return (
 			<React.Fragment>
@@ -48,4 +48,5 @@ export default class ButtonDemo extends React.Component {
 		);
 	}
 }
+export default ButtonDemo;
 ```

src/components/button/demos/group.md

@@ -13,7 +13,7 @@ desc: '通过 Button.Group 容器组件来包装 Button，可以统一设置 siz
 import React from 'react';
 import { Button, Icon } from 'cloud-react';
 
-export default class ButtonDemo extends React.Component {
+class ButtonDemo extends React.Component {
 	render() {
 		return (
 			<ul>
@@ -96,4 +96,5 @@ export default class ButtonDemo extends React.Component {
 		);
 	}
 }
+export default ButtonDemo;
 ```

src/components/button/demos/icon-button.md

@@ -12,7 +12,7 @@ desc: 可选值为组件库内所有 Icon 图标对应的类型代码
 import React from 'react';
 import { Button, InputNumber } from 'cloud-react';
 
-export default class ButtonDemo extends React.Component {
+class ButtonDemo extends React.Component {
 	render() {
 		return (
 			<ul>
@@ -44,4 +44,5 @@ export default class ButtonDemo extends React.Component {
 		);
 	}
 }
+export default ButtonDemo;
 ```