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

[liqunx]

What problem does this feature solve?

Validator添加自定义规则时候：

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

Validator.addRule('odd', (val, config, type) => !config || Number(val) % 2 === 1)
.addMessage('odd', 'Please input odd.')

显得比较优雅

[dolymood]

欢迎 PR