Fix memoized

[thomashoneyman]

Fixes #742 by using the same non-eta-expanded implementation as Spork. I tested this locally by updating the components-inputs example to use the previous implementation and the Spork implementation and could verify that the memoized function only works when done the Spork way.

[thomashoneyman]

If desired, I could also add a new example that demonstrates the lazy and memoized functions in action. It would most likely require unsafe logging in the render function to prove that the render fired or didn't fire.

[garyb]

Did you test it that way already after updating the implementation? I'm fine to skip including that in here, but it'd be good to know that it has been seen to work when we merge this 😄

[thomashoneyman]

I adjusted the existing components-inputs example to make sure this works :) I’d like to add a new example, though, just so we can more easily test in the future.

[thomashoneyman]

#747 demonstrates that this update does indeed fix the memoized function.