Remove constructor & add LIBXML_NSCLEAN

Author: tvdijen

src/DOMDocumentFactory.php

@@ -26,15 +26,6 @@
  */
 final class DOMDocumentFactory
 {
-    /**
-     * Constructor for DOMDocumentFactory.
-     * This class should never be instantiated
-     */
-    private function __construct()
-    {
-    }
-
-
     /**
      * @param non-empty-string $xml
      *
@@ -48,7 +39,7 @@ public static function fromString(string $xml): DOMDocument
         libxml_clear_errors();
 
         $domDocument = self::create();
-        $options = LIBXML_DTDLOAD | LIBXML_DTDATTR | LIBXML_NONET | LIBXML_PARSEHUGE;
+        $options = LIBXML_DTDLOAD | LIBXML_DTDATTR | LIBXML_NONET | LIBXML_PARSEHUGE | LIBXML_NSCLEAN;
         if (defined('LIBXML_COMPACT')) {
             $options |= LIBXML_COMPACT;
         }