index.js
function applyPlugin(extraPlugin) {
    if (Array.isArray(extraPlugin)) {
      const plugin = extraPlugin[0]
      const config = extraPlugin[1]
      return parser.use(plugin, config || {})
    }
    parser.use(extraPlugin)
  }
function applyPlugin(extraPlugin) {
    if (Array.isArray(extraPlugin)) {
      const plugin = extraPlugin[0]
      const config = extraPlugin[1]
      return parser.use(plugin, config || {})
    }
    parser.use(extraPlugin)
  }
parser.use(podcast, options.podcast || {})