sometimes versions happen and you want to alert your users
sometimes you want to tell users of your CLI script that there's a new version available.
this lets you do that!
var version = require'a-wild-version-appears'pkg = require'./package.json'versionpkgifnewer_availableconsole.error'there\'s a newer version of '+pkgname+' available! `npm install -g '+pkgname+'` to upgrade.'// keep on doing stuff.