chore(deps): update dependency verify.xunit to v30 (#779)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

src/ReactiveUI.Validation.Tests/ReactiveUI.Validation.Tests.csproj

@@ -16,7 +16,7 @@
     <PackageReference Include="Xunit.StaFact" Version="1.2.69" />
     <PackageReference Include="Microsoft.Reactive.Testing" Version="6.0.1" />
     <PackageReference Include="PublicApiGenerator" Version="11.4.6" />
-    <PackageReference Include="Verify.Xunit" Version="28.16.0" />
+    <PackageReference Include="Verify.Xunit" Version="30.3.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.1" />
     <PackageReference Include="coverlet.msbuild" Version="6.0.4">
       <PrivateAssets>all</PrivateAssets>