Switch README to Swiftz
Switch README to Swiftz

typelift/SwiftCheck,rnapier/SwiftCheck,DanielAsher/SwiftCheck,ryanbooker/SwiftCheck,ryanbooker/SwiftCheck,rnapier/SwiftCheck,typelift/SwiftCheck,mpurland/SwiftCheck,robrix/SwiftCheck,typelift/SwiftCheck,CodaFi/SwiftCheck,kykim/SwiftCheck,CodaFi/SwiftCheck,typelift/SwiftCheck,CodaFi/SwiftCheck,rnapier/SwiftCheck,CodaFi/SwiftCheck,typelift/SwiftCheck,DanielAsher/SwiftCheck,mpurland/SwiftCheck,kykim/SwiftCheck,robrix/SwiftCheck,mpurland/SwiftCheck,CodaFi/SwiftCheck