Get all chords names that are a superset of the given one (has the same notes and at least one more)
extended("CMaj7")// => [ 'Cmaj#4', 'Cmaj7#9#11', 'Cmaj9', 'CM7add13', 'Cmaj13', 'Cmaj9#11', 'CM13#11', 'CM7b9' ] Copy
extended("CMaj7")// => [ 'Cmaj#4', 'Cmaj7#9#11', 'Cmaj9', 'CM7add13', 'Cmaj13', 'Cmaj9#11', 'CM13#11', 'CM7b9' ]
Get all chords names that are a superset of the given one (has the same notes and at least one more)