refs and cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -13,7 +13,7 @@
     <PackageVersion Include="System.Memory" Version="4.6.0" />
     <PackageVersion Include="System.Net.Http" Version="4.3.4" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.1.2" />
-    <PackageVersion Include="Verify.XunitV3" Version="29.0.0" />
+    <PackageVersion Include="Verify.XunitV3" Version="28.9.0" />
     <PackageVersion Include="xunit.v3" Version="1.0.1" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="3.0.1" />
     <!-- explicit to avoid CVE -->