deps(dotnet): Bump ReactiveUI and Splat

Bumps ReactiveUI from 22.3.1 to 23.2.27
Bumps Splat from 19.2.1 to 19.3.1

---
updated-dependencies:
- dependency-name: ReactiveUI
  dependency-version: 23.2.27
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: Splat
  dependency-version: 19.3.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Directory.Packages.props

@@ -34,8 +34,8 @@
     <PackageVersion Include="CloudinaryDotNet" Version="1.28.0" />
     <!-- Reactive Extensions -->
     <PackageVersion Include="System.Reactive" Version="6.1.0" />
-    <PackageVersion Include="ReactiveUI" Version="22.3.1" />
-    <PackageVersion Include="Splat" Version="19.2.1" />
+    <PackageVersion Include="ReactiveUI" Version="23.2.27" />
+    <PackageVersion Include="Splat" Version="19.3.1" />
     <PackageVersion Include="Splat.NLog" Version="19.2.1" />
     <!-- Windows Desktop (WPF/WinForms) -->
     <PackageVersion Include="Microsoft.Xaml.Behaviors.Wpf" Version="1.1.142" />