Is there a way to set priority

[jonobr1]

Great plugin, thanks for sharing it with the public. Is there a way we can add <priority /> to specific pages either through the plugin config or directly in the frontmatter of a page?

More on priority.

E.g:

{
plugins: {
      'vuepress-plugin-sitemap': {
        hostname: 'http://ign.com/',
        exclude: ['/404.html'],
        priorities: {
          '/reviews/': 1.0,
          '/nintendo/': 0.5
        }
      }
}
}