Merge branch '3405382-min-stability-in-next-versions' into 'main'

Force min stability.

See merge request !230

includes/include.drupalci.main.yml

@@ -390,6 +390,7 @@ composer (next minor):
   variables:
     DRUPAL_CORE: $CORE_NEXT_MINOR
     IGNORE_PROJECT_DRUPAL_CORE_VERSION: 1
+    FORCE_MINIMUM_STABILITY: "dev"
 
 composer (next major):
   extends: .composer-base
@@ -400,6 +401,7 @@ composer (next major):
     PHP_VERSION: $CORE_PHP_MAX
     DRUPAL_CORE: $CORE_MAJOR_DEVELOPMENT
     IGNORE_PROJECT_DRUPAL_CORE_VERSION: 1
+    FORCE_MINIMUM_STABILITY: "dev"
 
 pages:
   stage: build

scripts/expand_composer_json.php

@@ -11,9 +11,13 @@ if (empty($project_name)) {
   throw new RuntimeException('Unable to determine project name.');
 }
 $ignore_project_core_version = (bool) getenv('IGNORE_PROJECT_DRUPAL_CORE_VERSION');
+$force_minimum_stability = getenv('FORCE_MINIMUM_STABILITY');
 
 $path = 'composer.json';
 $json_project = json_decode(file_get_contents($path), TRUE);
+if (!empty($force_minimum_stability)) {
+  $json_project['minimum-stability'] = $force_minimum_stability;
+}
 $json_default = default_json($project_name);
 
 if (