refs or cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -6,7 +6,7 @@
   <ItemGroup>
     <PackageVersion Include="AgileObjects.ReadableExpressions" Version="4.1.3" />
     <PackageVersion Include="MarkdownSnippets.MsBuild" Version="28.4.2" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.9.0" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.10.0" />
     <PackageVersion Include="Polyfill" Version="11.2.0" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.180" />
     <PackageVersion Include="Verify" Version="32.0.0" />