Issue #3180950: Allow Varbase to work with Composer ~2.0

.travis.yml

@@ -48,7 +48,7 @@ before_install:
   - phpenv rehash
   - COMPOSER_AUTH_PATH="$HOME/.composer/auth.json"
   - if [[ -f $COMPOSER_AUTH_PATH ]]; then rm $COMPOSER_AUTH_PATH; fi
-  - composer self-update --1
+  - composer self-update
   - composer --version
 
   # Composer Configurations.

composer.json

@@ -2,8 +2,6 @@
   "name": "vardot/varbase",
   "description": "Varbase: The Ultimate Drupal 8 CMS Starter Kit (Bootstrap Ready) | by Vardot",
   "type": "drupal-profile",
-  "homepage": "https://www.drupal.org/project/varbase",
-  "notification-url": "https://packages.drupal.org/8/downloads",
   "license": "GPL-2.0-or-later",
   "minimum-stability": "dev",
   "prefer-stable": true,
@@ -29,12 +27,11 @@
     }
   },
   "require": {
-		"composer/installers": "~1.0",
-    "oomphinc/composer-installers-extender": "~1.0",
+		"composer/installers": "~1.0 || ~2.0",
+    "oomphinc/composer-installers-extender": "~1.0 || ~2.0",
     "cweagans/composer-patches": "~1.0",
     "drupal/core-composer-scaffold": "^9",
-    "drupal/drupal-library-installer-plugin": "^0.3",
-    "drupal/core": "^9 || ~10.0.0",
+    "drupal/core": "~9.0",
     "drupal/varbase_core": "9.0.x-dev",
     "drupal/varbase_api": "9.0.x-dev",
     "drupal/varbase_media": "9.0.x-dev",