code: function getScraperResults (SCRAPER, urls, htmls) {
    return Promise.all(
      urls.map((url, i) => {
        const html = htmls[i]
        const name = SCRAPER.name
        const Module = require(name)
        return SCRAPER.scrape(Module, url, html).then(metadata => {
          return SCRAPER.normalize(metadata)
        })
      })
    )
  }
docs: Get metadata results from a single `SCRAPER` and `urls` and `htmls`.
  
  @param {Object} SCRAPER
  @param {Array} urls
  @param {Array} htmls
  @return {Promise} results