Update to 0.58

Upstream changes:
0.58    2018-06-08

- Re-release to fix the generated Makefile.PL. We do not want to try to build
  the XS code with compiler warnings enabled except on Perl 5.24+. There are
  unavoidable warnings with older Perls. If you tried to install this distro
  in an environment where AUTHOR_TESTING was set, these warnings would be
  enabled, along with "-Werror", causing the build to fail
  completely. Reported by Olaf Alders. GH #3.

(wen)