[Improvement] Field: support native events (#421)

docs/markdown/en-US/field.md

@@ -90,6 +90,7 @@ Filed support all native properties of input tag，such as `maxlength`、`placeh
 | icon | Right side Icon name | `String` | - | - |
 
 ### Event
+Filed support all native events of input tag，such as `keypress`、`keyup`
 
 | Event | Description | Parameters |
 |-----------|-----------|-----------|

docs/markdown/zh-CN/field.md

@@ -92,6 +92,7 @@ Filed 默认支持 Input 标签所有的原生属性，比如 `maxlength`、`pla
 | icon | 输入框尾部图标 | `String` | - |  Icon 组件支持的类型 |
 
 ### Event
+Filed 默认支持 Input 标签所有的原生事件，比如 `keypress`、`keyup` 等
 
 | 事件名称 | 说明 | 回调参数 |
 |-----------|-----------|-----------|