Peach and Blueberry Dump Cake with Pecans

I had no idea dump cakes were a thing.  Growing up, my grandmother would make dump cakes that consisted of canned pineapple, canned cherry pie filling, a box of yellow cake mix, pecans and butter.  I hated the fruit, but I loved the salty, buttery, sweet, fruity cake with pecans.  After my grandmother passed away,…