/**
 * Promise.any is the inverse of Promise.all
 *
 * Promise.all = reject  first error   or resolve all successes
 * Promise.any = resolve first success or reject  all errors
 */
Promise.any = function(promises) {
  return Promise.all(promises.map(p => {
    return p.then(
      resolve => { throw resolve; },
      reject => reject
    );
  })).then(
    rejects => { throw rejects },
    resolve => resolve
  );
};