FBSDKLoginKit - UIApplicationOpenURLOptionsSourceApplicationKey' is only available on iOS 9.0 or newer

Question

I am using FBSDKLoginKit to provide facebook login in my swift project. My deployment target is 9.0 but I keep on getting the following warnings. Any insight is greatly appreciated.

• UIApplicationOpenURLOptionsSourceApplicationKey' is only available on iOS 9.0 or newer

• UIApplicationOpenURLOptionsAnnotationKey' is only available on iOS 9.0 or newer

• openURL:options:completionHandler:' is only available on iOS 10.0 or newer

In my AppDelegate.swift I have the following for Facebook login:

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    FirebaseApp.configure()
    FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions)

    return true
}

func application(_ application: UIApplication,open url: URL, sourceApplication: String?, annotation: Any) -> Bool {
    return FBSDKApplicationDelegate.sharedInstance().application(application, open: url, sourceApplication: sourceApplication, annotation: annotation)
}