Fixed signing (#517)

* Fixed signing

Directory.Build.props

@@ -137,7 +137,7 @@
     </When>
   </Choose>
 
-  <PropertyGroup Condition="'$(IsUwpProject)' == 'true'">
+  <PropertyGroup>
 
     <!-- 8002 is a strong named -> non-strong-named reference -->
     <!-- This is valid for platforms other than .NET Framework (and is needed for the UWP targets -->

Lottie-Windows/Lottie-Windows-WinUI3/Lottie-Windows-WinUI3.csproj

@@ -11,14 +11,12 @@
     <CsWinRTIncludes>Microsoft</CsWinRTIncludes>
     <Platforms>x64;x86</Platforms>
     <DefineConstants>WINAPPSDK</DefineConstants>
-    <SignAssembly>False</SignAssembly>
+    <SignAssembly>True</SignAssembly>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Graphics.Win2D" Version="1.0.3.1" />
+    <PackageReference Include="Microsoft.Graphics.Win2D" Version="1.0.0.30" />
     <PackageReference Include="Microsoft.WindowsAppSDK" Version="1.0.3" />
-    <PackageReference Include="Microsoft.Windows.SDK.BuildTools" Version="10.0.22000.194" />
-    <PackageReference Include="System.Runtime.InteropServices.WindowsRuntime" Version="4.3.0" />
   </ItemGroup>
 
   <Import Project="..\Lottie-Windows.props" />