[BUGFIX] Add allowed plugins config

Author: helhum

composer.json

@@ -43,7 +43,11 @@
     },
     "config": {
         "vendor-dir": ".Build/vendor",
-        "bin-dir": ".Build/bin"
+        "bin-dir": ".Build/bin",
+        "allow-plugins": {
+            "typo3/class-alias-loader": true,
+            "typo3/cms-composer-installers": true
+        }
     },
     "scripts": {
         "post-autoload-dump": [