Cleaner doesn't cancel Tweens

[rafaskb]

When Tweens created by TweenService are added to Cleaner via Cleaner:Add(Tween), they're not cancelled.

This happens because Cleaner checks the typeof of the object being cleaned up, and Tween reports itself as Instance, but Tween:Destroy() doesn't work, we have to call Tween:Cancel() instead.

A simple fix would be to check whether Object:IsA("Tween") then Object:Cancel() else Object:Destroy(), but that's not very elegant.

As a workaround, we can always add a function that calls Cancel instead of passing the Tween directly, but the expected behavior is that Cleaner will just take care of it.

Tested in Cleaner v0.3.0