Execution example::

  normalize   'NormalizerNFKC121("unify_kana_prolonged_sound_mark", true)'   "カーキークーケーコー"   WITH_TYPES
  # [
  #   [
  #     0, 
  #     1337566253.89858, 
  #     0.000355720520019531
  #   ], 
  #   {
  #     "normalized": "カアキイクウケエコオ", 
  #     "types": [
  #       "katakana", 
  #       "katakana", 
  #       "katakana", 
  #       "katakana", 
  #       "katakana", 
  #       "katakana", 
  #       "katakana", 
  #       "katakana", 
  #       "katakana", 
  #       "katakana"
  #     ], 
  #     "checks": []
  #   }
  # ]
