Missed 'popup_use_bare_css' option in module config

Inside eu_cookie_compliance_page_attachments() function, there is a line where you are trying to pass new variable to JS using next:

      'popup_use_bare_css'   => !empty($config->get('popup_use_bare_css')) ? $config->get('popup_use_bare_css') : FALSE,

But there is no 'popup_use_bare_css' key in config. There is a key 'use_bare_css'
Adding a patch which fixes it.