Last fall I started seeing a recipe popping up online for something called “Pumpkin Dump Cake.” I like the traditional pineapple-cherry-and-yellow cake mix version just fine. But pumpkin just makes everything better! Especially this time of year! (Lest you be mislead by the name, “Dump Cake” refers more to the method than to the final product. It is not really “cake-y.” It could be re-named “Upside …