message: fix(Picker): When item.defaultIndex is 0, this.defaultIndex will be used
diff: @@ -327,7 +327,9 @@ export default createComponent({
  allowHtml={this.allowHtml}
  className={item.className}
  itemHeight={this.itemPxHeight}
  - defaultIndex={item.defaultIndex || +this.defaultIndex}
  + defaultIndex={
  + isDef(item.defaultIndex) ? item.defaultIndex : +this.defaultIndex
  + }
  swipeDuration={this.swipeDuration}
  visibleItemCount={this.visibleItemCount}
  initialOptions={item.values}
  