Log Message:
Updated to 6.76

Upstream changes:
6.76  2019-03-01
  -  Fixed bug in Date::Manip::Date::list_holidays.
        It was using 'now' instead of the stored date. Douglas DeStafeno

  -  Reordered TZ detection methods
        Moved checking the tzdata files to lower priority to avoid a pretty
        unusual situation in docker. Sven Nierlein (GitHub #20)

  -  Time zone fixes
        Newest zoneinfo data (tzdata 2018i). Requested by Shawn C Carroll
        (GitHub #28)