fix variable declaration regression

[bekzod]

itemsKeyIsAtThis used before its declared

[bekzod]

regressed with #15733

[rwjblue]

As evidenced by the passing tests the way it was does work. I tested locally (without transpilation):

function foo() {
  return bar;
}
let bar = "lol";
foo()

I only share this because I was also surprised that this was the behavior. I would have thought the exact thing you are fixing would cause an error (or not work).

Anyways, the change seems good to me, just thought I’d share...

[bekzod]

super logical javascript