message: Change iterator category to random access
diff: @@ -8015,7 +8015,7 @@ class basic_json
  typename basic_json::const_reference,
  typename basic_json::reference>::type;
  /// the category of the iterator
  - using iterator_category = std::bidirectional_iterator_tag;
  + using iterator_category = std::random_access_iterator_tag;
  /// default constructor
  iter_impl() = default;
  