It looks like Microsoft has pushed out an update to the Skype app on Windows Phone this evening, although it's not entirely clear what's new. Included with the update is an old changelog that references "a new, compact design," but there's nothing to go off of outside of that.
The update does bring the app up to version 220.127.116.11, and it's likely the update is just a round of bug fixes and performance improvements. Still, if you happen to run into anything new or notable, be sure to shout out in the comments below.
Thanks for the tips!