Add class when sticky hits bottom of container

[aulneau]

Hi there!

I would like to adjust the way that it leaves when the sticky hits the bottom of the sticky container. Ideally, I'd like for it to animate out, or add position: absolute; bottom:0 when it hits the bottom of the container.

Thanks!

[dbarbalato]

This feature would become possible with the release of v6.0.0