Update lutaml-model to v0.8.0

Gemfile

@@ -3,6 +3,9 @@ source "https://rubygems.org"
 # Specify your gem's dependencies in relaton_w3c.gemspec
 gemspec
 
+gem "lutaml-model", github: "lutaml/lutaml-model", branch: "main"
+gem "relaton-bib", github: "relaton/relaton-bib", branch: "upd-lutaml-model-to-0-8-0"
+
 gem "rake", "~> 13.0"
 gem "rspec", "~> 3.0"
 

lib/relaton/w3c/bibdata.rb

@@ -1,6 +1,7 @@
 module Relaton
   module W3c
     class Bibdata < Item
+      model ItemData
       include Bib::BibdataShared
     end
   end

lib/relaton/w3c/bibitem.rb

@@ -1,6 +1,7 @@
 module Relaton
   module W3c
     class Bibitem < Item
+      model ItemData
       include Bib::BibitemShared
     end
   end

lib/relaton/w3c/ext.rb

@@ -3,12 +3,9 @@
 module Relaton
   module W3c
     class Ext < Bib::Ext
-      attribute :schema_version, method: :get_schema_version
       attribute :doctype, Doctype
 
-      def get_schema_version
-        Relaton.schema_versions["relaton-model-w3c"]
-      end
+      def get_schema_version = Relaton.schema_versions["relaton-model-w3c"]
     end
   end
 end

spec/relaton/w3c/bibliography_spec.rb

@@ -72,7 +72,7 @@
     expect(doc.docidentifier[0].content).to eq "W3C xml"
   end
 
-  it "not found", vcr: "not_found" do
+  it "not found" do
     expect { described_class.get("W3C NOT-FOUND") }
       .to output(/Not found/).to_stderr_from_any_process
   end