build(deps): update Splat.Ninject requirement from 9.* to 10.* in /src (#2651)

Updates the requirements on [Splat.Ninject](https://github.com/reactiveui/splat) to permit the latest version.
- [Release notes](https://github.com/reactiveui/splat/releases)
- [Changelog](https://github.com/reactiveui/splat/blob/main/RELEASENOTES.md)
- [Commits](reactiveui/splat@9.0.4...10.0.1)

Signed-off-by: dependabot[bot] <[email protected]>

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

Author: dependabot[bot]

src/ReactiveUI.Splat.Tests/ReactiveUI.Splat.Tests.csproj

@@ -11,7 +11,7 @@
   <ItemGroup>
     <PackageReference Include="Splat.Autofac" Version="10.*" />
     <PackageReference Include="Splat.DryIoc" Version="10.*" />
-    <PackageReference Include="Splat.Ninject" Version="9.*" />
+    <PackageReference Include="Splat.Ninject" Version="10.*" />
   </ItemGroup>
 
   <ItemGroup>