Tween inner div width and height when animating

[pmdevita]

I still need to clean this up but I just want to see if there is any interest in merging it. I added some extra code to tween the width and height of the inner div of each grid cell. By doing this, the content resizes as expected rather than just stretching and suddenly resizing on animation completion. You can see a demo of this on my website, notice how the text reflows as the container changes size rather than simply changing size. https://peterdevita.com/#code

Thank you for this library by the way, I would have been completely lost without it!