certificate.builder in xml-kit-0.3.0

- old
+ new

@@ -1,9 +1,5 @@
 # frozen_string_literal: true
 
 xml.KeyDescriptor use ? { use: use } : {} do
-  xml.KeyInfo "xmlns": ::Xml::Kit::Namespaces::XMLDSIG do
-    xml.X509Data do
-      xml.X509Certificate stripped
-    end
-  end
+  render key_info, xml: xml
 end