Sling TV is increasing its monthly subscription prices by $5.99 for all of its plans starting in December. The streaming TV provider said “rising costs” are to blame for the price hikes without specifying why — presumably, not all six of those bucks are intended to pay for its “arcade” library of interactive games that just added Pac-Man and Trivia Crack . There are two packages: Sling Orange, which includes Disney and ESPN networks, and Sling Blue, which includes Fox and NBC programming that