Does not work with `react-transition-group`

For some reason, having a `withStyles` wrapped component as a child of a `TransitionGroup` breaks things and prevents the lib from seeing `componentWillLeave` and other lifecycle methods it needs access to.

@jeduan @lencioni @airbnb/webinfra

Start by reproducing the failure with a withStyles-wrapped component inside a TransitionGroup, focusing on how componentWillLeave and related lifecycle methods are exposed. There are no files or tests named in the issue; done means the transition library can access the required lifecycle methods and the regression is covered by a test.

Written by the indexing model from the issue text.