Added the "root" case to the Folder enumeration.

Test/Sources/Cases/Internal/Enumerations/FolderTests.swift

@@ -26,6 +26,7 @@ private extension FolderTests {
             "App/Sources",
             "Library/Sources/Public",
             "Library/Sources/Internal",
+            "",
             "Test/Sources/Cases/Public",
             "Test/Sources/Cases/Internal",
             "Test/Sources/Helpers"