…ange strict inequality operator to strict equality

…type

… for it

…ich gives different results depends on place of operands:

SET1 AGAINST SET2
  intersection         Set(2) { 1, 2 }
  union                Set(6) { 1, 2, 3, 4, 5, 6 }
  difference           Set(2) { 4, 5 }
  symmetricDifference  Set(3) { 1, 2, 5 }
  isSubsetOf           false
  isSupersetOf         false
  isDisjointFrom       true

SET2 AGAINST SET1
  intersection         Set(2) { 1, 2 }
  union                Set(6) { 1, 2, 6, 3, 4, 5 }
  difference           Set(0) {}
  symmetricDifference  Set(3) { 1, 2, 5 }
  isSubsetOf           true
  isSupersetOf         true
  isDisjointFrom       true

…s. Proof https://nodejs.org/en/blog/announcements/v22-release-announce

# Conflicts:
#	.github/workflows/coveralls.yml

…age.json

…t type

…new-set-methods