use enzyme-adapter-react-helper and ENV REACT to auto install multi version react and react-dom and configure enzyme-react-adapter-${REACT}. (update enzyme, version)
update .travis.yml add 0.14/15.x/16.x and nodejs base image as matrix branch testing
fix some npm start:docs runtime warning (update react-docgen version)
Support react v16 as peer dependencies
including below changes:
enzyme-adapter-react-helperand ENVREACTto auto install multi versionreactandreact-domand configureenzyme-react-adapter-${REACT}. (updateenzyme, version).travis.ymladd0.14/15.x/16.xand nodejs base image as matrix branch testingnpm start:docsruntime warning (updatereact-docgenversion)