Invert the key/value of an object. Example:
{foo: 'bar'}
→{bar: 'foo'}
$ npm install --save invert-kv
var invertKv = require('invert-kv');
invertKv({foo: 'bar', unicorn: 'rainbow'});
//=> {bar: 'foo', rainbow: 'unicorn'}
MIT © Sindre Sorhus