Update .NET test stack to 31.19.1

Author: renovate[bot]

src/Refit.GeneratorTests/Refit.GeneratorTests.csproj

@@ -28,7 +28,7 @@
     <PackageReference Include="TUnit" Version="1.47.0" />
     <PackageReference Include="Verify.DiffPlex" Version="3.2.0" />
     <PackageReference Include="Verify.SourceGenerators" Version="2.5.0" />
-    <PackageReference Include="Verify.TUnit" Version="31.18.0" />
+    <PackageReference Include="Verify.TUnit" Version="31.19.1" />
     <PackageReference Include="System.Reactive" Version="6.1.0" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.11.0" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing" Version="1.1.3" />

src/Refit.Tests/Refit.Tests.csproj

@@ -47,7 +47,7 @@
     <PackageReference Include="RichardSzalay.MockHttp" Version="$(MockHttpVersion)" />
     <PackageReference Include="Verify.DiffPlex" Version="3.2.0" />
     <PackageReference Include="Verify.SourceGenerators" Version="2.5.0" />
-    <PackageReference Include="Verify.TUnit" Version="31.18.0" />
+    <PackageReference Include="Verify.TUnit" Version="31.19.1" />
     <ProjectReference Include="..\Refit.HttpClientFactory\Refit.HttpClientFactory.csproj" />
     <ProjectReference Include="..\Refit.Newtonsoft.Json\Refit.Newtonsoft.Json.csproj" />
     <ProjectReference Include="..\Refit.Xml\Refit.Xml.csproj" />