Workaround test-summary issue with .NET 4.7.2

Author: RehanSaeed

build.cake

@@ -75,6 +75,9 @@ Task("Test")
                     NoRestore = true,
                     ResultsDirectory = artefactsDirectory,
                 });
+            // Workaround the test-summary GitHub Action not being able to handle empty JUnit test result XML files.
+            // https://github.com/test-summary/action/issues/19
+            DeleteFiles($"./**/{project.GetFilenameWithoutExtension()}_NETFramework472.xml");
         });
 
 Task("Pack")