test/ruby/enc/test_emoji_breaks.rb does not deal with Unicode ranges in file emoji-sequences.txt
ruby 3.1.0dev (2021-06-03T06:59:33Z master 7e14762159) [x86_64-linux]
While working on issue #17750, I found out that test_emoji_breaks.rb does not deal with Unicode ranges in the file emoji-sequences.txt. That means that the tests may not cover all emoji. This should eventually be fixed, but requires some rewriting of the code, which I plan to do independently of the Unicode/Emoji version upgrade.