update README (#4124)

README-zh_CN.md

@@ -66,6 +66,9 @@ tsconfig.json
 }
 ```
 
+> 注意：设置 `allowSyntheticDefaultImports` 避免 `error TS1192: Module 'react' has no default export` 的错误。
+
+
 ## 链接
 
 - [首页](http://ant.design/)

README.md

@@ -74,7 +74,6 @@ import 'antd/dist/antd.css';  // or 'antd/dist/antd.less'
    import 'antd/lib/date-picker/style/css';  // with style
    ```
 
-
 ## Environment Support
 
 * Browser: Modern browsers and Internet Explorer 9+.
@@ -96,6 +95,8 @@ tsconfig.json
 }
 ```
 
+> Note: set `allowSyntheticDefaultImports` to prevent `error TS1192: Module 'react' has no default export`.
+
 ## Links
 
 - [Home page](http://ant.design/)