message: fix(pull-up): fix "pullingUp" event execution time
  fix
diff: @@ -119,7 +119,7 @@ export default class PullUp implements PluginAPI {
  if (
  this.scroll.movingDirectionY === Direction.Positive &&
  - pos.y <= this.scroll.maxScrollY + threshold
  + pos.y <= this.scroll.maxScrollY - threshold
  ) {
  this.pulling = true
  // must reset pulling after scrollEnd
  