fix: blank author name for ES index

Author: ElliottAYoung

app/models/author_field_type.rb

@@ -16,13 +16,13 @@ def field_item_as_indexed_json_for_field_type(field_item, options = {})
   end
 
   def mapping
-    {author_name: mapping_field_name, type: :string, analyzer: :snowball}
+    { name: mapping_field_name, type: :string, analyzer: :snowball }
   end
 
   private
 
   def mapping_field_name
-    "#{field_name.parameterize('_')}_author_name"
+    "#{field_name.parameterize('_')}_author"
   end
 
   def author_name_present