🍒 Update ReactiveUI to .NET 5

Shadowsocks.WPF/Shadowsocks.WPF.csproj

@@ -52,11 +52,11 @@
     <PackageReference Include="MaterialDesignThemes" Version="3.2.0" />
     <PackageReference Include="MdXaml" Version="1.6.0" />
     <PackageReference Include="OxyPlot.Wpf" Version="2.0.0" />
-    <PackageReference Include="ReactiveUI.Events.WPF" Version="12.1.5" />
-    <PackageReference Include="ReactiveUI.Fody" Version="12.1.5" />
+    <PackageReference Include="ReactiveUI.Events.WPF" Version="13.0.1" />
+    <PackageReference Include="ReactiveUI.Fody" Version="13.0.1" />
     <PackageReference Include="ReactiveUI.Validation" Version="1.8.6" />
-    <PackageReference Include="ReactiveUI.WPF" Version="12.1.5" />
-    <PackageReference Include="Splat.NLog" Version="9.7.1" />
+    <PackageReference Include="ReactiveUI.WPF" Version="13.0.1" />
+    <PackageReference Include="Splat.NLog" Version="9.8.1" />
     <PackageReference Include="System.CommandLine" Version="2.0.0-beta1.20371.2" />
     <PackageReference Include="System.Reactive" Version="5.0.0" />
     <PackageReference Include="WPFLocalizeExtension" Version="3.8.0" />