Add ability to specify description in Rollbax.Exception

[astery]

[astery]

This change will add missing description exception field (it is described here - https://explorer.docs.rollbar.com/#operation/create-item - data.trace.exception.description)

Example:

%Rollbax.Exception{
  class: "NameError",
  message: "global name 'foo' is not defined",
  description: "Something went wrong while trying to save the user object", # here is the one
  stacktrace: stacktrace,
  custom: metadata,
  occurrence_data: occurrence_data
}
|> Rollbax.report_exception()

@jgmchan, @whatyouhide, @lexmag - I tag you in a hope that you can help to review and merge that PR, thank you.

[whatyouhide]

Hey @astery, I'm not among the maintainers of this library anymore. @lexmag are you? Should we try to find new maintainers for this?

[tomdos]

Hi @whatyouhide @lexmag , do yo think there is any chance to merge this one ? Thanks

[whatyouhide]

As I said, I’m not maintaining this library anymore, sorry.