Execution example:
normalize 'NormalizerNFKC("unify_katakana_v_sounds", true)' "ヴァヴィヴヴェヴォヴ" WITH_TYPES
# [
# [
# 0,
# 1337566253.89858,
# 0.000355720520019531
# ],
# {
# "normalized": "バビブベボブ",
# "types": [
# "katakana",
# "katakana",
# "katakana",
# "katakana",
# "katakana",
# "katakana",
# "null"
# ],
# "checks": [
#
# ]
# }
# ]