Fix a bug preventing [SupportedOSPlatform] from being correctly set

Directory.Build.props

@@ -95,10 +95,6 @@
       Condition=" '$(UniversalWindowsPlatformTargetFrameworks)' == '' And '$(SupportsUniversalWindowsPlatformTargeting)' == 'true' ">
       uap10.0.17763
     </UniversalWindowsPlatformTargetFrameworks>
-
-    <SupportedOSPlatformVersion Condition=" '$(TargetPlatformIdentifier)' == 'iOS' ">12.0</SupportedOSPlatformVersion>
-    <SupportedOSPlatformVersion Condition=" '$(TargetPlatformIdentifier)' == 'Windows' ">7.0</SupportedOSPlatformVersion>
-    <TargetPlatformMinVersion   Condition=" '$(TargetPlatformIdentifier)' == 'Windows' ">7.0</TargetPlatformMinVersion>
   </PropertyGroup>
 
   <PropertyGroup>

Directory.Build.targets

@@ -15,6 +15,12 @@
     <PublicSign>false</PublicSign>
   </PropertyGroup>
 
+  <PropertyGroup>
+    <SupportedOSPlatformVersion Condition=" '$(TargetPlatformIdentifier)' == 'iOS' ">12.0</SupportedOSPlatformVersion>
+    <SupportedOSPlatformVersion Condition=" '$(TargetPlatformIdentifier)' == 'Windows' ">7.0</SupportedOSPlatformVersion>
+    <TargetPlatformMinVersion   Condition=" '$(TargetPlatformIdentifier)' == 'Windows' ">7.0</TargetPlatformMinVersion>
+  </PropertyGroup>
+
   <!--
     Note: .NET Framework and .NET Core <3.0/.NET Standard assemblies are not annotated
     with nullable references annotations. To avoid errors on these target frameworks,

src/OpenIddict.Client.SystemIntegration/OpenIddictClientSystemIntegrationHelpers.cs

@@ -273,10 +273,12 @@ public static class OpenIddictClientSystemIntegrationHelpers
             {
                 try
                 {
+#pragma warning disable CA1416
                     using var scenes = UIApplication.SharedApplication.ConnectedScenes;
                     var scene = scenes.ToArray<UIWindowScene>().FirstOrDefault();
 
                     return scene?.Windows.FirstOrDefault();
+#pragma warning restore CA1416
                 }
 
                 catch (InvalidCastException)
@@ -294,10 +296,12 @@ public static class OpenIddictClientSystemIntegrationHelpers
             {
                 try
                 {
+#pragma warning disable CA1416
                     using var scenes = UIApplication.SharedApplication.ConnectedScenes;
                     var scene = scenes.ToArray<UIWindowScene>().FirstOrDefault();
 
                     return scene?.Windows;
+#pragma warning restore CA1416
                 }
 
                 catch (InvalidCastException)