refs and cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -19,7 +19,7 @@
     <PackageVersion Include="NServiceBus.Newtonsoft.Json" Version="4.1.0" />
     <PackageVersion Include="NServiceBus.Transport.SqlServer" Version="8.1.9" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.156" />
-    <PackageVersion Include="Polyfill" Version="8.7.1" />
+    <PackageVersion Include="Polyfill" Version="8.7.3" />
     <PackageVersion Include="Verify.SqlServer" Version="11.1.2" />
     <PackageVersion Include="Verify.XunitV3" Version="30.4.0" />
     <PackageVersion Include="xunit.v3" Version="2.0.3" />