Ant-design-mobile picker组件问题

#1

Version
2.2.2

Environment
macOs、chrome 67.0.3396.99

Reproduction link
https://codepen.io/EmperorOfEuropa/pen/EpwvGQ

Steps to reproduce
点击取消 遮罩 确定等都没有消失动画，直接不见了

What is expected?
跟官网demo一样

What is actually happening?
没有任何动画直接消失