chore: update to support latest rc of turbo-ios

[unRARed]

closes #7

Could be more to this, but this allowed the latest 7.0.0-rc.7 package to build on my system.

[unRARed]

this is the meaningful piece per hotwired/turbo-ios@7.0.0-rc.5...7.0.0-rc.6#diff-b8eedf003187f841896b81cea7ce824a547fb8f3cc3ad74717f09e3bdbadebb9R14

[rhelsing]

@dalezak This is useful, I had to do the same.

    func startApp() {
        // app setup
        self.navigationController?.setNavigationBarHidden(true, animated: false)
        self.navigationController?.view.backgroundColor = UIColor(hexRGB: "#121212")
        loadNavBar()
        loadTabBar()
        loadTabs()
        loadHome()     
    }

override func viewDidLoad() {
        super.viewDidLoad()
        startApp()
    }

    func sessionWebViewProcessDidTerminate(_ session: Session) {
        self.navigationController?.popViewController(animated: false)
        self.navigationController?.viewControllers = []
        self.tabBar = makeTabBar()
        self.session = makeSession()
        self.modalSession = makeSession()
        self.settings = loadSettings()
        self.processPool = WKProcessPool()
        startApp()
    }