Extract SwitchChangeEventHandler and SwitchSize
Extract SwitchChangeEventHandler and SwitchSize

With this change, we can define change handler more convenience:

Before:

```javascript
const handleChange = (checked: boolean, event: MouseEvent) => {
  ...
}
```

After:

```javascript
const handleChange: SwitchChangeEventHandler = (checked, event) => {
  ...
}
```

elevensky/ant-design,elevensky/ant-design,ant-design/ant-design,elevensky/ant-design,icaife/ant-design,ant-design/ant-design,elevensky/ant-design,ant-design/ant-design,ant-design/ant-design,icaife/ant-design,zheeeng/ant-design,icaife/ant-design,zheeeng/ant-design,zheeeng/ant-design,zheeeng/ant-design,icaife/ant-design