Drop support for composer v1

Author: swissspidy

composer.json

@@ -13,7 +13,7 @@
   ],
   "require": {
     "ext-json": "*",
-    "composer/composer": "^1.10.23 || ^2.2.17",
+    "composer/composer": "^2.2.25",
     "wp-cli/wp-cli": "^2.12"
   },
   "require-dev": {