code: function loadSitemapIntoConfig(program, config) {
  	const sitemapUrl = program.sitemap;
  	const sitemapFind = (
  		program.sitemapFind ?
  		new RegExp(program.sitemapFind, 'gi') :
  		null
  	);
  	const sitemapReplace = program.sitemapReplace || '';
  	const sitemapExclude = (
  		program.sitemapExclude ?
  		new RegExp(program.sitemapExclude, 'gi') :
  		null
  	);
  
  	return Promise.resolve()
  		.then(() => {
  			return fetch(sitemapUrl);
  		})
  		.then(response => {
  			return response.text();
  		})
  		.then(body => {
  			const $ = cheerio.load(body, {
  				xmlMode: true
  			});
  
  			$('url > loc').toArray().forEach(element => {
  				let url = $(element).text();
  				if (sitemapExclude && url.match(sitemapExclude)) {
  					return;
  				}
  				if (sitemapFind) {
  					url = url.replace(sitemapFind, sitemapReplace);
  				}
  				config.urls.push(url);
  			});
  
  			return config;
  		})
  		.catch(error => {
  			if (error.stack && error.stack.includes('node-fetch')) {
  				throw new Error(`The sitemap "${sitemapUrl}" could not be loaded`);
  			}
  			throw new Error(`The sitemap "${sitemapUrl}" could not be parsed`);
  		});
  }
docs: Load a sitemap from a remote URL, parse out the URLs, and add them to an existing config object