message: fix(scroller.ts): fix ios 13.4 bouncing
  fix
diff: @@ -49,6 +49,7 @@ export default class Scroller {
  left: number
  top: number
  }
  + _reflow: number
  resizeTimeout: number
  lastClickTime: number | null
  [key: string]: any
  @@ -524,7 +525,9 @@ export default class Scroller {
  if (xInBoundary && yInBoundary) {
  return false
  }
  -
  + // fix ios 13.4 bouncing
  + // see it in issues 982
  + this._reflow = this.content.offsetHeight
  // out of boundary
  this.scrollTo(x, y, time, easing)
  