Version 15.4.1

As starting Chrome 55, there is a new event `auxclick` to handle middle click, and `click` doesn't trigger by middle click anymore
https://developers.google.com/web/updates/2016/10/auxclick
export const TOP_LOST_POINTER_CAPTURE = unsafeCastStringToDOMTopLevelType(
  'lostpointercapture',
);
export const TOP_MOUSE_DOWN = unsafeCastStringToDOMTopLevelType('mousedown');
export const TOP_MOUSE_MOVE = unsafeCastStringToDOMTopLevelType('mousemove');
export const TOP_MOUSE_OUT = unsafeCastStringToDOMTopLevelType('mouseout');
export const TOP_MOUSE_OVER = unsafeCastStringToDOMTopLevelType('mouseover');
export const TOP_MOUSE_UP = unsafeCastStringToDOMTopLevelType('mouseup');
export const TOP_PASTE = unsafeCastStringToDOMTopLevelType('paste');
export const TOP_PAUSE = unsafeCastStringToDOMTopLevelType('pause');
export const TOP_PLAY = unsafeCastStringToDOMTopLevelType('play');
export const TOP_PLAYING = unsafeCastStringToDOMTopLevelType('playing');
export const TOP_POINTER_CANCEL = unsafeCastStringToDOMTopLevelType(
  'pointercancel',
);
export const TOP_POINTER_DOWN = unsafeCastStringToDOMTopLevelType(
  'pointerdown',
);
export const TOP_POINTER_ENTER = unsafeCastStringToDOMTopLevelType(
  'pointerenter',
);
export const TOP_POINTER_LEAVE = unsafeCastStringToDOMTopLevelType(
  'pointerleave',
);
export const TOP_POINTER_MOVE = unsafeCastStringToDOMTopLevelType(
  'pointermove',
);
export const TOP_POINTER_OUT = unsafeCastStringToDOMTopLevelType('pointerout');
export const TOP_POINTER_OVER = unsafeCastStringToDOMTopLevelType(
  'pointerover',