Prodigy Brewing, which will occupy a historic building on Logan’s Center Street, is targeting a mid-2021 opening. “We’re still gunning for July,” says Kristin Smith, who’s handling the marketing for the soon-to-open brewpub. “We’re ready to get this rolling.” Update: The brewery is now eyeing a September 2021 opening. The 5,500-square-foot space will feature two…