fixed issue "Fatal error: Class 'HTML5_Tokenizer' not found " when enable_html5parser option enabled

Author: ddetyuk

src/DOMPDFModule/Service/DOMPDFFactory.php

@@ -107,7 +107,11 @@ public function createService(ServiceLocatorInterface $serviceLocator)
 
             define(static::$configCompatMapping[$key], $value);
         }
-        
+		
+        if ($config['enable_html5parser']) {
+            require_once DOMPDF_LIB_DIR . '/html5lib/Parser.php';
+        }
+		
         require_once DOMPDF_INC_DIR . '/functions.inc.php';
         require_once __DIR__ . '/../../../config/module.compat.php';