[New Feature] Validate扩展方法和类型能不能增加链式调用

### What problem does this feature solve?
Validator添加自定义规则时候：
```javascript
Validator.addRule('odd', (val, config, type) => !config || Number(val) % 2 === 1)
Validator.addMessage('odd', 'Please input odd.')
```
显得比较蛋疼，最好能链式调用
```javascript
Validator.addRule('odd', (val, config, type) => !config || Number(val) % 2 === 1)
.addMessage('odd', 'Please input odd.')
```

显得比较优雅