Shorthand properties fail

[Rich-Harris]

// input
(function () {
  var longname = 1;
  var obj = { longname };
  console.log(obj);
}());

// expected
!function(){var a=1,b={longname:a};console.log(b)}()

// actual
!function(){var a=1,b={a};console.log(b)}()

[Rich-Harris]

Fixed in 0.3.2