`isEqual` has incorrect output for `Map`s / `Set`s

Example:

```ts
const s1 = new Set(['a']);
const s2 = new Set(['b']);

const m1 = new Map([['a', 1]]);
const m2 = new Map([['b', 2]]);

console.log(isEqual(s1, s2) || isEqual(m1, m2));
```

Current output: `true`.
Expected output: `false`.