chore(deps): update .net test stack

Author: renovate[bot]

src/ReactiveMvvm.Tests/ReactiveMvvm.Tests.csproj

@@ -6,16 +6,16 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="coverlet.msbuild" Version="6.0.2">
+    <PackageReference Include="coverlet.msbuild" Version="8.0.0">
         <PrivateAssets>all</PrivateAssets>
         <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
     <PackageReference Include="FluentAssertions" Version="6.12.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
     <PackageReference Include="NSubstitute" Version="5.3.0" />
     <PackageReference Include="ReactiveUI.Testing" Version="20.2.45" />
     <PackageReference Include="xunit" Version="2.9.0" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
+    <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>