15.6.0 (June 13, 2017) React Downgrade deprecation warnings to use console.warn instead of console.error. (@flarnie in #9753) Add a deprecation warning for React.createClass. Points users to create-react-class instead. (@flarnie in #9771) Add deprecation warnings and separate module for React.DOM factory helpers. (@nhunzaker in #8356) Warn for deprecation of React.createMixin helper, which was nev