Log Message:
Updated p5-DateTime-TimeZone to 2.13.

2.13    2017-06-01

- Really fix the indexing issue. For reals this time. I'm totally not
  kidding. Thanks to Grinnz on #metacpan for giving me the solution.

2.12    2017-06-01

- Attempting to fix indexing of DateTime::TimeZone::Catalog on metacpan
  again. No real code or zone changes. Reported by Greg Oscwhald. GH #19.