Incompatibility with css-modules

[alexbardas]

Hi,

rc-animate seems to be incompatible with css-modules right now. More context about this issue can be found here. If transitionName is an object, appearActive, enterActive and leaveActive properties are not used.

There's also an issue in css-animate because '-active' is hardcoded for any animation.

Css modules seems to have quite a big adoption right now, so a backwards compatible change would make sense in my opinion.

[yiminghe]

transitionName={{
    enter: style.enter,
    enterActive: style.enterActive,
    leave: style.leave,
    leaveActive: style.leaveActive,
  }}