refs and cleanup

Author: SimonCropp

src/Verify.Sylvan.Data.Excel/Verify.Sylvan.Data.Excel.csproj

@@ -8,6 +8,6 @@
     <PackageReference Include="Sylvan.Data.Excel" />
     <PackageReference Include="Verify" />
     <PackageReference Include="ProjectDefaults" PrivateAssets="all" />
-    <PackageReference Include="Microsoft.Sbom.Targets" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.Sbom.Targets" PrivateAssets="all" Condition="$(Configuration)=='Release'" />
   </ItemGroup>
 </Project>