fix(Transition): should reset enter class when have appear props

[underfin]

fix #1150

[underfin]

The props with Transition component is static.Maybe we can change Transition implement use setup instead of functional.But it is complex for watch the transition enter finish.

So, I think this will be better solution.
When mount is used appear class, we can reset origin class when finish event trigger.

Well.That will be great solution to put this into BaseTransition.
1.It is make other high-order-component can re-use this.
2. it is owner of the appear props.

[yyx990803]

I think this is good enough - BaseTransition does not have the concept of classes since it's platform agnostic.