Reset Notifications min version to 10240

Author: andrewleader

Microsoft.Toolkit.Uwp.Notifications/Microsoft.Toolkit.Uwp.Notifications.csproj

@@ -15,6 +15,8 @@
     </Description>
     <PackageTags>notifications win10 windows 10 tile tiles toast toasts badge xml uwp c# csharp c++</PackageTags>
     <ExtrasImplicitPlatformPackageIsPrivate Condition=" '$(TargetFramework)' == 'native' ">true</ExtrasImplicitPlatformPackageIsPrivate>
+    <DefaultTargetPlatformMinVersion>10240</DefaultTargetPlatformMinVersion>
+    <TargetPlatformMinVersion>10.0.10240.0</TargetPlatformMinVersion>
   </PropertyGroup>
 
   <Choose>