Fix animation break on first present with fullScreenCover style

Sources/ScreenNavigatorKit/Internal/Helpers/Binding+when.swift

@@ -0,0 +1,21 @@
+//
+//  Binding+when.swift
+//  
+//
+//  Created by Ernest Babayan on 12.06.2022.
+//
+
+import SwiftUI
+
+extension Binding {
+    func when<Wrapped>(_ isTrue: Bool) -> Binding<Value> where Value == Wrapped? {
+        Binding(
+            get: {
+                isTrue ? self.wrappedValue : nil
+            },
+            set: { newValue, transaction in
+                self.transaction(transaction).wrappedValue = newValue
+            }
+        )
+    }
+}

Sources/ScreenNavigatorKit/ModalStack/PresentScreen.swift

@@ -36,11 +36,8 @@ struct PresentScreenView<Content: View>: View {
     @ObservedObject var screen: PresentScreen
 
     var body: some View {
-        switch screen.presentationStyle {
-        case .sheet, .none:
-            content.sheet($screen.presentedView)
-        case .fullScreenCover:
-            content.fullScreenCover($screen.presentedView)
-        }
+        content
+            .sheet($screen.presentedView.when(screen.presentationStyle == .sheet))
+            .fullScreenCover($screen.presentedView.when(screen.presentationStyle == .fullScreenCover))
     }
 }