Allow specifying timeout

[soundrussian]

It seems like there's no way to pass config to underlying Faraday adapters.

Right now we have to do this ugly hack:

 module Clickhouse
    class Connection
      module Client
        def client
          @client ||= Faraday.new(url: url) do |f|
            f.adapter :net_http do |http|
              http.read_timeout = 300
            end
          end
        end
      end
    end
  end

Is there anyway to pass this config to the client? Or perhaps we should make 300 seconds the default timeout, since that's the default in Clickhouse server as well?