Log Message:
Update to 1.27

Upstream changes:
1.27  Wed Jan  2 19:42:56 2019
    - DUCET is updated (for Unicode 10.0.0) as Collate/allkeys.txt.
    - The default UCA_Version is 36.
    - Locale/*.pl and CJK/Korean.pm are updated.

1.26  Mon Dec 31 14:32:07 2018
    - U::C::Locale newly supports locale: cu.
    - tailoring Cyrillic YI as BYELORUSSIAN-UKRAINIAN I with DIAERESIS.
      (affected locale: kk)
    - added loc_cu.t in t.