message: Use std::swap in quic::CircularDeque::swap
  Summary: instead of the embrassing manual swap
diff: @@ -445,12 +445,8 @@ void CircularDeque<T>::clear() noexcept {
  template <typename T>
  void CircularDeque<T>::swap(CircularDeque<T>& other) noexcept {
  storage_.swap(other.storage_);
  - auto tempBegin = other.begin_;
  - auto tempEnd = other.end_;
  - other.begin_ = begin_;
  - other.end_ = end_;
  - begin_ = tempBegin;
  - end_ = tempEnd;
  + std::swap(begin_, other.begin_);
  + std::swap(end_, other.end_);
  }
  } // namespace quic
  