Arr::unique() cannot process non-scalar items

[alexstandiford]

It would be nice to have a way to filter out unique items that are non-scalar.

 interface Something{

 public function getValue(): array; // or int, or string, whatever.
 }

 Arr::reduce([new Something(1), Something(2), Something(1)], function($acc, $item)
 {
 $id = Str::createHash($item);

 if (!isset($acc[$id])) {
 $acc[$id] = $item;
 }

 return array_values($acc);
 }

This is how you have to do it now, but ideally Arr::unique() would be smart enough to handle this. But right now Arr::unique() throws an exception if you try to use it on an array of objects.