[Bug]: Inaccurate `Map` clone

[xvyashar]

Describe the issue

The clone function converts all Map keys to strings when cloning a Map.

Consider this case:

const m = new Map();
m.set('a', 1);
m.set(10, 'b');
m.set({ prop: 'val' }, 'c');

const c = clone(m);
console.log(c);

Expected Behavior

Map(3) { 'a' => 1, 10 => 'b', { prop: 'val' } => 'c' }

Actual Behavior

Map(3) { 'a' => 1, '10' => 'b', '[object Object]' => 'c' }