message: Set react pop time to 0 for consistency
diff: @@ -17,7 +17,7 @@ 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) : undefined;
  + nextItem.reactPop = !matchedItem ? (item.reactPop || tick) : 0;
  return nextItem;
  })
  .concat(data
  