Upgrade xunit to version 2.4.2

Author: Francisco-Gamino

test/E2E/Azure.Functions.PowerShellWorker.E2E/Azure.Functions.PowerShellWorker.E2E/Azure.Functions.PowerShellWorker.E2E.csproj

@@ -13,7 +13,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.4.1" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
     <PackageReference Include="WindowsAzure.Storage" Version="9.3.3" />
-    <PackageReference Include="xunit" Version="2.3.1" />
+    <PackageReference Include="xunit" Version="2.4.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.3.1" />
   </ItemGroup>