Update license for packagist.org

composer.json

@@ -4,7 +4,7 @@
     "type": "composer-plugin",
     "keywords": ["Drupal", "Development", "Docker"],
     "homepage": "https://gitlab.lakedrops.com/composer/plugin/docker4drupal",
-    "license": "GPL-2.0+",
+    "license": "GPL-2.0-or-later",
     "authors": [
         {
             "name": "Jürgen Haas",