gaphor: furnish meta attributes; add normalcea as maintainer

  };

  meta = {

    description = "Simple modeling tool written in Python";

    homepage = "https://github.com/gaphor/gaphor";

    description = "UML and SysML modeling tool";

    longDescription = ''

      Gaphor is a UML, SysML, RAAML, and C4 modeling application. It

      is designed to be easy to use, while still being powerful.

      Gaphor implements a fully-compliant UML 2 data model, so it is

      much more than a picture drawing tool. You can use Gaphor to

      quickly visualize different aspects of a system as well as

      create complete, highly complex models.

      Gaphor provides four modeling languages: UML, SysML, RAAML and C4 and

      makes them accessible to beginners.

    '';

    homepage = "https://gaphor.org/";

    changelog = "https://github.com/gaphor/gaphor/releases/tag/${version}";

    license = lib.licenses.asl20;

    maintainers = with lib.maintainers; [ normalcea ];

    teams = [ lib.teams.gnome-circle ];

    mainProgram = "gaphor";

    platforms = lib.platforms.linux;

  };

}