Dropping down to commonmark 1.0 to fix even more fatal issue

https://www.drupal.org/project/markdown/issues/3268341

composer.json

@@ -34,7 +34,6 @@
     "require": {
         "composer/installers": "^1.9",
         "cweagans/composer-patches": "^1.7",
-        "dflydev/dot-access-data": "^3.0",
         "drupal/allowed_formats": "^1.1",
         "drupal/antibot": "^1.2",
         "drupal/backup_migrate": "^5",
@@ -75,7 +74,7 @@
         "drupal/link_attributes": "^1.9",
         "drupal/linkit": "^6",
         "drupal/mailsystem": "^4.3",
-        "drupal/markdown": "3.0.x-dev@dev",
+        "drupal/markdown": "^3.0@RC",
         "drupal/menu_link_config": "^1.0@alpha",
         "drupal/menu_trail_by_path": "^1.1",
         "drupal/microformats": "^2",
@@ -118,7 +117,7 @@
         "drupal/wysiwyg_linebreaks": "^1.10",
         "drush/drush": "^11.0",
         "drutopia/drutopia": "dev-8.x-1.x",
-        "league/commonmark": "^2.2",
+        "league/commonmark": "^1.0",
         "vlucas/phpdotenv": "^5.1",
         "webflo/drupal-finder": "^1.2"
     },