Updates4.swift

// MARK: Bundle
public extension Bundle {
    var appVersion: String {
        return self.info(for: "CFBundleShortVersionString", or: "0.0.0")
    }
    
    var bundleId: String {
        return self.info(for: "CFBundleIdentifier")
    }
    
    func info(for key: String,
              or default: String = "") -> String! {
        let value: String? = self.object(forInfoDictionaryKey: key) as? String
        return value ?? ""
    }
}