Loosely comparator with Set gives false result

[LuKks]

Hello! This library looks like a great alternative for deep-equal but there are some cases where I can't make it work:

console.log(deepEql(
  new Set([null, '', 1, 5, 2, false]),
  new Set([undefined, 0, '5', true, '2', '-000']),
  { comparator: loosely }
))

function isPrimitive (value) {
  return value === null || typeof value !== 'object'
}

function loosely (a, b) {
  // console.log('loosely', [typeof a, typeof b], [a, b])
  if (!isPrimitive(a)) return null
  if (!isPrimitive(b)) return null
  const equal = a == b
  // console.log('loosely primitives', [a, b], 'equal?', equal)
  return equal
}

Currently I'm trying to test against several deep-equal tests to ensure that is mostly compatible to not break anything in the lib switching. Probably it's a good idea as you could find bugs this way

Btw I took the loosely comaprator from here: #47 (comment)

Thanks!

[LuKks]

Solved with own library: https://github.com/holepunchto/same-object