cakephp/utility should require ext-simplexml
cakephp/utility should require ext-simplexml

The Xml utility relies on the SimpleXMLElement class existing, which is only available if the SimpleXML extension is installed. Therefore the package should be requiring that `ext-simplexml` is present.
cakephp/cakephp,mvdriel/cakephp,mvdriel/cakephp,ndm2/cakephp,ADmad/cakephp,cakephp/cakephp,mvdriel/cakephp,mvdriel/cakephp,dakota/cakephp,dakota/cakephp,dakota/cakephp,ndm2/cakephp,ADmad/cakephp,cakephp/cakephp,CakeDC/cakephp,CakeDC/cakephp,dakota/cakephp,CakeDC/cakephp,ndm2/cakephp,CakeDC/cakephp,ADmad/cakephp,cakephp/cakephp,ndm2/cakephp,ADmad/cakephp