How about improving it to add Oj's options?

[dc7303]

Thank you for your awesome project!
I had a question while using this project, so I left an issue.

When using the JSON parser in Faraday, I can add options like the code below.

      Faraday.new(
        ...
      ) do |conn|
        ...
        conn.response :json, parser_options: { :symbolize_names => true }
      end

If this is possible, What do you think of improving it to be able to add options like this?