Xcode12.1 deprecated warning

[rshimokura]

LayoutSupport.swift

    public extension UIViewController {
        var car_topLayoutGuide : LayoutSupport {
            get {
                return LayoutSupport(layoutGuide: self.topLayoutGuide)
            }
        }
        
        var car_bottomLayoutGuide : LayoutSupport {
            get {
                return LayoutSupport(layoutGuide: self.bottomLayoutGuide)
            }
        }
    }

'topLayoutGuide' was deprecated in iOS 11.0: Use view.safeAreaLayoutGuide.topAnchor instead of topLayoutGuide.bottomAnchor

'bottomLayoutGuide' was deprecated in iOS 11.0: Use view.safeAreaLayoutGuide.bottomAnchor instead of bottomLayoutGuide.topAnchor