metadata.builder in saml-kit-1.0.10

- old
+ new

@@ -1,4 +1,6 @@
+# frozen_string_literal: true
+
 xml.instruct!
 xml.EntityDescriptor entity_descriptor_options do
   signature_for(reference_id: id, xml: xml)
   render identity_provider, xml: xml
   render service_provider, xml: xml