Upgrade to xUnit 2.4

Author: Chris Martinez

test/directory.build.props

@@ -14,8 +14,8 @@
   <ItemGroup Condition=" '$(MSBuildProjectExtension)' != '.shproj' ">
     <PackageReference Include="FluentAssertions" Version="5.4.1" />
     <PackageReference Include="Moq" Version="4.9.0" />
-    <PackageReference Include="xunit" Version="2.4.0-rc.1.build4038" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.0-rc.1.build4038" />
+    <PackageReference Include="xunit" Version="2.4.0" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.0" />
   </ItemGroup>
 
 </Project>