Add reverse option

[andrewrubin]

Ticket: https://wethecollective.teamwork.com/app/tasks/22769488

Description

Adds a new prop, reverse, which simply reverses the direction of the animation.

Additional Notes

• It looks like changeset might not be working for this repo :( If that's the case I'll bump the version manually.
• This package could use an upgrade to CSS Modules, but I will leave that for a major version bump later on.

Usage

<Marquee speed={20} reverse>
  <img src="image-1.png" alt="" width="500" height="500" />
  <img src="image-2.png" alt="" width="500" height="500" />
  <img src="image-3.png" alt="" width="500" height="500" />
</Marquee>

[marlonmarcello]

🍰