Relation with recursive reference causes infinite loop (even if it's not in the data)

[Tofandel]

✏️ Describe the bug
Transforming a model in which there is a relation in which another relation points to itself will result in an infinite loop

↪️ To Reproduce
Provide us a pest test like this one which shows the problem:

it('does not loop infinitely on relations', function () {
    $m1 = new FakeModel();
    $m2 = new FakeNestedModel();
    $m2->setRelation('parent', $m1);
    $m1->setRelation('pivot', $m2);

    FakeModelData::from($m1); //Infinite loop
});

[rubenvanassche]

Fixed with PR