refs and cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -20,6 +20,6 @@
     <PackageVersion Include="Verify.NUnit" Version="28.7.1" />
     <PackageVersion Include="Xamarin.Essentials" Version="1.8.0" />
     <PackageVersion Include="Xamarin.Google.Android.Material" Version="1.10.0.1" />
-    <PackageVersion Include="Microsoft.Sbom.Targets" Version="4.1.3" />
+    <PackageVersion Include="Microsoft.Sbom.Targets" Version="4.1.4" />>
   </ItemGroup>
 </Project>