drop support for Composer v1

Author: llaville

CHANGELOG.md

@@ -16,6 +16,7 @@ using the [Keep a CHANGELOG](http://keepachangelog.com) principles.
 ### Removed
 
 - drop support for PHP 7.3 has ended 6th December 2021.
+- drop support for Composer v1
 
 ## [1.3.0] - 2022-01-09
 

composer.json

@@ -6,6 +6,7 @@
     "require": {
         "php": "^7.4|^8.0",
         "ext-json": "*",
+        "composer-runtime-api": "^2.0",
         "doctrine/collections": "^1.6.5",
         "symfony/config": "^4.4|^5.0",
         "symfony/console": "^4.4|^5.0",