message: fix(config): more test friendly
diff: import cloneDeep from 'lodash/cloneDeep'
  import { DeepReadonly } from './typings/helpers'
  -const langUI = browser.i18n.getUILanguage().replace('-', '_')
  +const langUI = (browser.i18n.getUILanguage() || 'en').replace('-', '_')
  const langCode = /^zh_CN|zh_TW|en$/.test(langUI)
  ? langUI === 'zh_HK'
  ? 'zh_TW'
  