document die_on_existing_version
v4.300036

          read CPAN::Uploader config with CPAN::Uploader, to work with new
          trial releases supporting encrypted credential (thanks, Mike Doherty)

          improve tester tests (thanks, Dave O'Neill!)

          use Class::Load instead of Class::MOP

          better error messages when a bundle can't be loaded by @Filter

          make dynamic_config distmeta sticky; once one plugin sets it, it
          stays stuck

          add a die_on_existing_version option to PkgVersion

          switch (for now?) "dzil install" to use cpanm

          PkgVersion won't rewrite file contents if nothing was changed
          (thanks, Mike Doherty!)