code: function deployToDevice (appPath, target, extraArgs) {
      // Deploying to device...
      if (target) {
          return spawn('ios-deploy', ['--justlaunch', '-d', '-b', appPath, '-i', target].concat(extraArgs));
      } else {
          return spawn('ios-deploy', ['--justlaunch', '--no-wifi', '-d', '-b', appPath].concat(extraArgs));
      }
  }
docs: Deploy specified app package to connected device
  using ios-deploy command
  @param  {String} appPath Path to application package
  @return {Promise}        Resolves when deploy succeeds otherwise rejects