Output <link rel="alternate" on HTML version of the entity

This feature is now fully supported and introduced in Markdownify 1.0.0-rc8 → .

Thank you to everyone who contributed to the implementation of this module!

Thank you i'mbatman
but the feature print system node url nor the alias.
Can you check?

It works in my hands @trickfun.
Steps I took:
- updated to current module version (RC8)
- cleared all caches (important)
- checked for a node in Drupal CMS and found this inside :
<link rel="alternate" type="text/markdown" title="Blog" href="https://cms-1.ddev.site:4443/node/3.md">

Views pages are not supported if my testing is correct.

I think system node URL is fine, since we cannot depend with certainty that the core Path module and Markdownify Path Alias module are enabled. Drupal's canonical URL settings will take care of SEO issues in most cases.
So I'd say this issue is closed as fixed.