React 15.4.0 is not supporting import `react/lib/*`

[pedramphp]

React 15.4.0 is not supporting import react/lib/* or react-dom/lib/* anymore.

React package and browser build no longer "secretly" includes React DOM.
Release wiki: https://github.com/facebook/react/releases/tag/v15.4.0
Dan Abramov tweet: https://twitter.com/dan_abramov/status/798926305030877184

Please review the code in the animationMixin.js
animationMixin.js:

react-toastr/lib/ToastMessage/animationMixin.js

Line 7 in b0fadc4

var _ReactTransitionEvents = require("react/lib/ReactTransitionEvents");

[tomchentw]

Released v2.9.1