chore(deps): update .net test stack

Author: renovate[bot]

src/Directory.Packages.props

@@ -25,13 +25,13 @@
   <ItemGroup>
     <PackageVersion Include="ReactiveUI.Testing" Version="23.1.8" />
     <PackageVersion Include="Microsoft.Reactive.Testing" Version="6.1.0" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
     <PackageVersion Include="NSubstitute" Version="5.3.0" />
     <PackageVersion Include="bunit" Version="2.6.2" />
     <PackageVersion Include="Microsoft.Testing.Extensions.CodeCoverage" Version="18.6.2" />
     <PackageVersion Include="Microsoft.Testing.Platform.MSBuild" Version="2.1.0" />
     <PackageVersion Include="TUnit" Version="1.17.36" />
-    <PackageVersion Include="Verify.TUnit" Version="31.13.2" />
+    <PackageVersion Include="Verify.TUnit" Version="31.16.2" />
   </ItemGroup>
   <!-- Example projects only -->
   <ItemGroup>