refs and cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -11,7 +11,7 @@
     <PackageVersion Include="Polyfill" Version="8.9.0" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.158" />
     <PackageVersion Include="Sylvan.Data.Csv" Version="1.4.2" />
-    <PackageVersion Include="Sylvan.Data.Excel" Version="0.4.30" />
+    <PackageVersion Include="Sylvan.Data.Excel" Version="0.5.0" />
     <PackageVersion Include="Verify" Version="30.17.0" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.1.2" />
     <PackageVersion Include="Verify.NUnit" Version="30.17.0" />