Twit doesn't return instances of Error when errors occur

twit_errors.js

var Twit = require('twit');

var t = new Twit({
  consumer_key: 'a',
  consumer_secret: 'b',
  access_token: 'c',
  access_token_secret: 'd'
});

t.get('user/timeline', function (err, result) {
  // err is just a plain object - we should instead return instances of Error (and still keep all of twitter's details)
  console.log(err);
});