Cleanup

exam/classes/GUID/GUID.php

@@ -4,6 +4,10 @@ namespace Khofmann\GUID;
 
 class GUID
 {
+  private function __construct()
+  {
+  }
+
   public static function v4($data = null): string
   {
     // Generate 16 bytes (128 bits) of random data or use the data passed into the function.