Bump ReactiveUI.WPF from 14.1.1 to 14.2.1 (#63)

Bumps [ReactiveUI.WPF](https://github.com/reactiveui/reactiveui) from 14.1.1 to 14.2.1.
- [Release notes](https://github.com/reactiveui/reactiveui/releases)
- [Commits](reactiveui/ReactiveUI@14.1.1...14.2.1)

---
updated-dependencies:
- dependency-name: ReactiveUI.WPF
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

NatTypeTester/NatTypeTester.csproj

@@ -24,7 +24,7 @@
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="5.0.0" />
     <PackageReference Include="ModernWpfUI" Version="0.9.4" />
     <PackageReference Include="ReactiveUI.Events.WPF" Version="14.1.1" />
-    <PackageReference Include="ReactiveUI.WPF" Version="14.1.1" />
+    <PackageReference Include="ReactiveUI.WPF" Version="14.2.1" />
     <PackageReference Include="Splat.Microsoft.Extensions.DependencyInjection" Version="11.1.1" />
     <PackageReference Include="Volo.Abp.Autofac" Version="4.4.0" />
   </ItemGroup>