graphics/rubygem-tanuki_emoji: update to 0.6.0

Required for gitlab-ce 14.9
Changelog:
https://gitlab.com/gitlab-org/tanuki_emoji/-/blob/main/CHANGELOG.md

0.6.0 - 2022-02-16

Added

Character responds to ascii_aliases which contain ASCII aliases from Gemojione

Fixed

Fixed TanukiEmoji.add command, which should now require category: to be provided
Fixed issue where TanukiEmoji::Index#codepoints_pattern would split apart emoji-modifier pairs