Check app version, whether should load user guide

AppGuide.swift

protocol AppGuide {
    func shouldLoadAppGuide() -> Bool
}

extension AppGuide {
    func shouldLoadAppGuide() -> Bool {
        guard let versionString = Bundle.main.object(forInfoDictionaryKey: "CFBundleVersion") as? String else {
            return false
        }
        guard let currentVersion = Int(versionString) else {
            return false
        }
        let lastVersion = UserDefaults.standard.integer(forKey: "CFBundleVersion")
        
        guard currentVersion > lastVersion else {
            return false
        }
        UserDefaults.standard.set(currentVersion, forKey: "CFBundleVersion")
        return true
    }
}