Merge pull request #279 from distantcam/dependabot/nuget/Polyfill-7.18.0

Author: distantcam

src/Directory.Packages.props

@@ -12,7 +12,7 @@
     <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.13.0" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0" />
-    <PackageVersion Include="Polyfill" Version="7.17.0" />
+    <PackageVersion Include="Polyfill" Version="7.18.0" />
     <PackageVersion Include="System.Formats.Asn1" Version="9.0.2" />
     <PackageVersion Include="Verify.SourceGenerators" Version="2.5.0" />
     <PackageVersion Include="Verify.Xunit" Version="28.12.1" />