the superset to test against (chroma or list of notes) @return{function(PcsetChroma|NoteNames[]): boolean} a function accepting a set to test against (chroma or list of notes)
const inCMajor = Pcset.isSubsetOf(["C", "E", "G"])
inCMajor(["e6", "c4"]) // => true
inCMajor(["e6", "c4", "d3"]) // => false
Create a function that test if a collection of notes is a subset of a given set
The function is curryfied.