While “Derry Girls” continues to be the last word in young, raucous female rebellion on the Emerald Isle, “A Bump Along the Way” has a little something to add. Sin the same Northern Irish city as the hit Netflix sitcom, but shedding the ’90s nostalgia for the Snapchat age, Shelly Love’s appealing, unassuming debut feature is a bright reminder that while Derry girls may grow up, they don’t entirely grow out of their antics.