message: Follow W3 specs for `pointerId` mouse value
  See:
diff: @@ -14,7 +14,7 @@ mixins.delayMixin(
  interactiveTarget
  );
  -const MOUSE_POINTER_ID = 'MOUSE';
  +const MOUSE_POINTER_ID = 1;
  // helpers for hitTest() - only used inside hitTest()
  const hitTestEvent = {
  