refs or cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -15,7 +15,7 @@
     <PackageVersion Include="Verify.Nunit" Version="32.0.0" />
     <PackageVersion Include="Microsoft.Sbom.Targets" Version="4.1.5" />
     <PackageVersion Include="Argon" Version="0.36.0" />
-    <PackageVersion Include="DiffEngine" Version="20.1.2" />
+    <PackageVersion Include="DiffEngine" Version="20.2.0" />
     <PackageVersion Include="EmptyFiles" Version="8.18.2" />
     <PackageVersion Include="SimpleInfoName" Version="3.2.0" />
   </ItemGroup>