refs or cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -6,9 +6,9 @@
   <ItemGroup>
     <PackageVersion Include="Argon" Version="0.33.5" />
     <PackageVersion Include="EmptyFiles" Version="8.17.2" />
-    <PackageVersion Include="MarkdownSnippets.MsBuild" Version="28.0.0" />
+    <PackageVersion Include="MarkdownSnippets.MsBuild" Version="28.0.1" />
     <PackageVersion Include="Microsoft.Sbom.Targets" Version="4.1.5" />
-    <PackageVersion Include="Polyfill" Version="9.17.0" />
+    <PackageVersion Include="Polyfill" Version="9.18.0" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.172" />
     <PackageVersion Include="Serilog" Version="4.3.1" />
     <PackageVersion Include="Serilog.Sinks.File" Version="7.0.0" />
@@ -17,7 +17,7 @@
     <PackageVersion Include="Verify.ImageMagick" Version="3.8.4" />
     <PackageVersion Include="Verify.WinForms" Version="4.0.0" />
     <PackageVersion Include="Verify.TUnit" Version="31.13.2" />
-    <PackageVersion Include="DiffEngine" Version="18.4.2" />
+    <PackageVersion Include="DiffEngine" Version="19.0.0" />
     <PackageVersion Include="SimpleInfoName" Version="3.2.0" />
     <PackageVersion Include="Verify" Version="31.13.2" />
     <PackageVersion Include="TUnit" Version="1.18.21" />