refs and cleanup

Author: SimonCropp

src/.editorconfig

@@ -34,6 +34,9 @@ resharper_replace_with_single_call_to_first_or_default_highlighting = error
 # Replace with single call to Any(..)
 resharper_replace_with_single_call_to_any_highlighting = error
 
+# Simplify negative equality expression
+resharper_negative_equality_expression_highlighting = error
+
 # Replace with single call to Count(..)
 resharper_replace_with_single_call_to_count_highlighting = error
 

src/Directory.Packages.props

@@ -4,13 +4,13 @@
     <CentralPackageTransitivePinningEnabled>true</CentralPackageTransitivePinningEnabled>
   </PropertyGroup>
   <ItemGroup>
-    <PackageVersion Include="DiffPlex" Version="1.8.0" />
+    <PackageVersion Include="DiffPlex" Version="1.9.0" />
     <PackageVersion Include="MarkdownSnippets.MsBuild" Version="28.0.0-beta.2" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
     <PackageVersion Include="NUnit" Version="4.4.0" />
     <PackageVersion Include="NUnit3TestAdapter" Version="5.1.0" />
     <PackageVersion Include="Polyfill" Version="8.8.1" />
-    <PackageVersion Include="ProjectDefaults" Version="1.0.157" />
+    <PackageVersion Include="ProjectDefaults" Version="1.0.158" />
     <PackageVersion Include="Verify" Version="30.13.0" />
     <PackageVersion Include="Verify.Nunit" Version="30.13.0" />
     <PackageVersion Include="Microsoft.Sbom.Targets" Version="4.1.2" />