Everything is infused with something these days. Rarely does one find a bar that doesn't have some kind of aquarium on the sill filled with some concoction of booze and fruit. Sons of Liberty Spirit Co. has made a pumpkin spice whiskey that hits New England shelves this fall. In the Midwest, Great Lakes Distillery has come out with its version as well. Theirs is a derivative of ever-popular pumpkin lager.