babel package was deprecated, running
babel doesn’t actually transform ES2015 to ES5, and the old docs have basically disappeared.
But Don’t Panic! To get you up to speed, I’ve put together a brief list of the six most important changes. And if you need a little more help, my Complete Guide to ES6 with Babel 6 will walk you through the practical details; including the CLI, Webpack, Mocha and Gulp.