If I said yes and it broke while you were riding it, and you fell down and hurt yourself, would you sue me?
The dropouts are aluminum like the rest of the frame. I don't know how successful you would be filing a vertical dropout enough to gain enough clearance for a wider tire. Shimming in front of the axle would be unnecessary; the QR has more than enough biting force to hold it, as long as you adjust the QR properly (wheels with QR's on bikes with horizontal dropouts don't slip).