message: fix(List): incorrect reaching edge condition when direction is up
diff: @@ -95,7 +95,7 @@ export default createComponent({
  const placeholderRect = this.$refs.placeholder.getBoundingClientRect();
  if (direction === 'up') {
  - isReachEdge = placeholderRect.top - scrollerRect.top <= offset;
  + isReachEdge = scrollerRect.top - placeholderRect.top <= offset;
  } else {
  isReachEdge = placeholderRect.bottom - scrollerRect.bottom <= offset;
  }
  