Add missing XML serializer's CDATA options

Author: alexpozzi

components/serializer.rst

@@ -1199,6 +1199,12 @@ Option                          Description
 ``save_options``                XML saving `options with libxml`_                  ``0``
 ``remove_empty_tags``           If set to true, removes all empty tags in the      ``false``
                                 generated XML
+``cdata_wrapping``              If set to false, disables automatic CDATA          ``true``
+                                wrapping (see `cdata_wrapping_pattern` option for
+                                more information)
+``cdata_wrapping_pattern``      A regular expression pattern to determine if the   ``/[<>&]/``
+                                content of the node should be wrapped in a CDATA
+                                section
 ==============================  =================================================  ==========================
 
 Example with custom ``context``::