bump version to 2.2.0
bump version to 2.2.0

joolswills/EmulationStation,zigurana/EmulationStation,zigurana/EmulationStation,zigurana/EmulationStation,jrassa/EmulationStation,jrassa/EmulationStation,jrassa/EmulationStation,jrassa/EmulationStation,joolswills/EmulationStation,joolswills/EmulationStation,joolswills/EmulationStation