ESPN’s Apple TV app has been upgraded to include a new MultiCast feature that allows users to view up to four streams at the same time, according to Variety. EPSN typically features 30 or more live events on a given day, all of which will be available for simultaneous viewing. The company has also released an update to its iOS app, adding a “Watch” tab that provides live streams of events and shows. In other tvOS app news from Variety,…