message: fix(Calendar): month-show event triggered multiple times
diff: @@ -278,7 +278,8 @@ export default createComponent({
  visibleRange[0] = i;
  }
  - if (!months[i].visible) {
  + if (!months[i].showed) {
  + months[i].showed = true;
  this.$emit('month-show', {
  date: months[i].date,
  title: months[i].title,
  