refs or cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -10,6 +10,7 @@
     <PackageVersion Include="NUnit3TestAdapter" Version="5.2.0" />
     <PackageVersion Include="Polyfill" Version="9.3.0" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.163" />
+    <PackageVersion Include="ProjectFiles" Version="0.1.2" />
     <PackageVersion Include="SixLabors.ImageSharp" Version="3.1.12" />
     <PackageVersion Include="Verify" Version="31.7.2" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.1.2" />

src/Tests/Tests.csproj

@@ -7,6 +7,7 @@
     <PackageReference Include="MarkdownSnippets.MsBuild" PrivateAssets="all" />
     <PackageReference Include="NUnit" />
     <PackageReference Include="NUnit3TestAdapter" />
+    <PackageReference Include="ProjectFiles" />
     <PackageReference Include="Verify.DiffPlex" />
     <PackageReference Include="Verify.Http" />
     <PackageReference Include="Verify.ImageMagick" />