Function wrapError

lib/script.js:183–188

(err)

};

function wrapError(err) {
  if (err && err.__proto__ && global[err.__proto__.name]) {
    err.__proto__ = global[err.__proto__.name].prototype;
  }
  return err;
}

function isPromise(obj) {
  //maybe not the best of all checks but at least it's compliant to Promises/A+