build(deps): bump ReactiveUI from 19.4.1 to 19.5.1 in /src (#1061)

Bumps [ReactiveUI](https://github.com/reactiveui/reactiveui) from 19.4.1 to 19.5.1.
- [Release notes](https://github.com/reactiveui/reactiveui/releases)
- [Commits](reactiveui/ReactiveUI@19.4.1...19.5.1)

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

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

src/ReactiveUI.DI.Tests/ReactiveUI.DI.Tests.csproj

@@ -28,7 +28,7 @@
   </Choose>
 
   <ItemGroup>
-    <PackageReference Include="ReactiveUI" Version="19.4.1" />
+    <PackageReference Include="ReactiveUI" Version="19.5.1" />
   </ItemGroup>
 
   <ItemGroup>