Loosen Drupal core constraint.

.gitignore

-/composer.lock
 docroot/
 node_modules/
 vendor/

.travis.yml

@@ -20,7 +20,7 @@ env:
     # release, dev-develop to track Dev/HEAD, or any other Composer version
     # string.
     # @see https://getcomposer.org/doc/articles/versions.md
-    - ORCA_VERSION=dev-master
+    - ORCA_VERSION=v2.11.3
     - ORCA_TELEMETRY_ENABLE=TRUE
 
 matrix:
@@ -45,6 +45,7 @@ matrix:
     - env: ORCA_JOB=CORE_NEXT
 
 before_install:
+  - composer self-update 1.10.16
   - composer create-project --no-dev acquia/orca ../orca "$ORCA_VERSION"
   - ../orca/bin/travis/before_install.sh
 

composer.json

@@ -6,18 +6,18 @@
     "require": {
         "drupal/autosave_form": "^1.2",
         "drupal/conflict": "^2.0-alpha2",
-        "drupal/core": "^8.8.10 || ~9.0.6",
+        "drupal/core": "^8.8.10 || ^9.0.6",
         "drupal/diff": "^1.0",
         "drupal/lightning_core": "3.* || 4.* || 5.*",
         "drupal/moderation_dashboard": "^1.0",
         "drupal/moderation_sidebar": "^1.2"
     },
     "require-dev": {
+        "composer/installers": "^1.9",
         "drupal/core-composer-scaffold": "*",
         "drupal/core-dev": "*",
         "drupal/inline_entity_form": "^1.0",
         "drush/drush": ">=9.7",
-        "oomphinc/composer-installers-extender": "^1.1 || ^2",
         "vijaycs85/drupal-quality-checker": "^1.0"
     },
     "config": {
@@ -53,9 +53,7 @@
                 "type:drupal-core"
             ],
             "docroot/libraries/{$name}": [
-                "type:drupal-library",
-                "type:bower-asset",
-                "type:npm-asset"
+                "type:drupal-library"
             ],
             "docroot/modules/contrib/{$name}": [
                 "type:drupal-module"
@@ -66,11 +64,7 @@
             "docroot/themes/contrib/{$name}": [
                 "type:drupal-theme"
             ]
-        },
-        "installer-types": [
-            "bower-asset",
-            "npm-asset"
-        ]
+        }
     },
     "autoload": {
         "psr-4": {