Resize window containing NavigationSplitView

The macOS code shown below uses SwiftUI to create a two column NavigationSplitView. The detail views are different sizes but the window does not change size when the detail view changes. How can I adjust the window size based on the detail view?

import SwiftUI

struct AppleView: View {
    var body: some View {
        Text("Apple View 🍎").font(.title)
            .frame(width: 500, height: 300)
            .background(.purple)
    }
}

struct KiwiView: View {
    var body: some View {
        Text("Kiwi View 🥝").font(.title)
            .frame(width: 400, height: 500)
            .background(.green)
    }
}

enum Fruit: String, CaseIterable {
    case apple = "Apple"
    case kiwi = "Kiwi"
}

struct DetailView: View {

    @Binding var selectedItem: Fruit

    var body: some View {
        switch selectedItem {
        case .apple:
            AppleView()
        case .kiwi:
            KiwiView()
        }
    }
}

struct ContentView: View {

    @State private var selectedFruit: Fruit = .apple

    var body: some View {
        NavigationSplitView {
            List(Fruit.allCases, id: \.self, selection: $selectedFruit) { fruit in
                Text(fruit.rawValue)
            }
        } detail: {
            DetailView(selectedItem: $selectedFruit)
        }
    }
}