Micro Sitemap Drupal 9 version

Hi,

The attached patch works with the latest version of the sitemap, there seems to be a problem with the plugin weight initialization, but the submit is ok.

Could you give me the maintener status ?

Fix empty config

Hello @netsliver. I gave you maintener rights on the project. Welcome !

Fix error: Uncaught PHP Exception Error: "Typed property Drupal\sitemap\Form\SitemapSettingsForm::$sitemapManager must not be accessed before initialization"