Plugin is rendering wrong urls in sitemap if urlPrefix is set

[koboldt]

Hi,

i am new to scully.io and tried your plugin. But if i define my sitemapOptions and use an urlPrefix

const sitemapOptions = {
  urlPrefix: 'http://localhost'
}

then the url in the sitemap.xml is rendered like this:

<url>
    <loc>http:\localhost\foo\bar</loc>
    <changefreq>monthly</changefreq>
    <lastmod>2020-03-02T21:30:17.232Z</lastmod>
    <priority>0.5</priority>
</url>

I think it might be better to use url-join instead of path.join in order to concatenate the url/loc.

Kind regards

[msacket]

Thanks @koboldt, good point. I'll get that fixed asap.