fix(specs): Make sure page versions match

Nested elements are now validated to share the same page version

Author: tvdeyen

spec/serializers/alchemy/json_api/element_serializer_spec.rb

@@ -8,11 +8,10 @@
       :alchemy_element,
       autogenerate_ingredients: true,
       tag_list: "Tag1,Tag2",
-      nested_elements: [nested_element],
       parent_element: parent_element
     )
   end
-  let(:nested_element) { FactoryBot.create(:alchemy_element) }
+  let!(:nested_element) { FactoryBot.create(:alchemy_element, parent_element: element) }
   let(:parent_element) { FactoryBot.create(:alchemy_element) }
   let(:options) { {} }