Please have one base exception class for all json exceptions

[yurivict]

I do

  try {
    // some code processing json
  } catch (nlohmann::json::parse_error e) {
    // process exception
  }  ...

But it also throws nlohmann::detail::type_error and other exceptions.
Please consider having one base class for all exceptions, so that the users can just have one catch clause for all of them. Otherwise, it seems that they need to have at least 5 catch statements for json errors now.

[yurivict]

Invalid.