message: removed ES6 code for IE11 support
diff: console.log('Running all demos...');
  runEveryTest()
  - .catch(err => {
  + .catch(function(err) {
  console.error(err.toString());
  })
  - .then(() => {
  + .then(function() {
  console.log('..done!');
  });
  }
  