league/commonmark 2.10.4 on PHP Packagist

Fixed HeadingPermalinkExtension overwriting an id set on a heading by the AttributesExtension when heading_permalink/apply_id_to_heading is enabled; the existing id is now used (with the configured prefix) for both the heading and its permalink (#1159, #1160)
Fixed Symfony DebugClassLoader deprecation notice about ArrayCollection::offsetGet() by adding an explicit @return annotation (#1158)