message: Removed redundant reactProp
diff: @@ -8,7 +8,6 @@ class PopSync<T> extends React.Component<PopSyncProps<T>, any> {
  this.popNative = this.popNative.bind(this);
  }
  static getDerivedStateFromProps(props, {items: prevItems, data: prevData}) {
  - var tick = Date.now();
  var {data, getKey} = props;
  if (data === prevData)
  return null;
  @@ -19,14 +18,13 @@ class PopSync<T> extends React.Component<PopSyncProps<T>, any> {
  var matchedItem = dataByKey[item.key];
  var nextItem: any = {key: item.key, data: matchedItem || item.data};
  nextItem.index = !matchedItem ? item.index : matchedItem.index;
  - nextItem.reactPop = !matchedItem ? (item.reactPop || tick) : 0;
  return nextItem;
  })
  .concat(data
  .filter(item => !itemsByKey[getKey(item)])
  .map(item => {
  var index = dataByKey[getKey(item)].index;
  - return {key: getKey(item), data: item, index, reactPop: 0};
  + return {key: getKey(item), data: item, index};
  })
  )
  .sort((a, b) => a.index !== b.index ? a.index - b.index : a.key.length - b.key.length);
  