CI Bonfire read global config variable

Example:

Config file :

application/config/address.php

Controller :

$this->load->config('address');
$address = config_item('address.countries');

TypeError: 'unicode' does not have the buffer interface

from 0.9.4 to 0.9.6

# pip install --upgrade Werkzeug

References :
TypeError: 'unicode' does not have the buffer interface · Issue #17 · miguelgrinberg/flasky