Update JSON base class

Author: matthewdunbar

lib/active_record/connection_adapters/sqlserver/type/json.rb

@@ -2,7 +2,7 @@ module ActiveRecord
   module ConnectionAdapters
     module SQLServer
       module Type
-        class Json < ActiveRecord::Type::Internal::AbstractJson
+        class Json < ActiveRecord::Type::Json
 
         end
       end