2.0.0beta4

the scrollToCompat.js has a little bug, that is  
`function scrollToCompat(scrollResponder, y, x, animated = false) {
  if (isLegacyReactNative()) {
    scrollResponder.scrollTo(y, x, animated)
  } else {
    scrollResponder.scrollTo({x, y, animated})
  }
}`
'animate' to 'animated',because the official doc need {x:x,y:y,animated:true}
