refs and cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -28,7 +28,7 @@
     <PackageVersion Include="Verify.WinForms" Version="4.0.0" />
     <PackageVersion Include="Verify.Xunit" Version="30.19.1" />
     <PackageVersion Include="Xunit" Version="2.9.3" />
-    <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.4" />
+    <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.5" />
     <PackageVersion Include="XunitContext" Version="3.3.2" />
   </ItemGroup>
 </Project>