use core dev branch

Author: tatevikg1

composer.json

@@ -36,7 +36,7 @@
     },
     "require": {
         "php": "^8.1",
-        "phplist/core": "dev-blacklist",
+        "phplist/core": "dev-dev",
         "friendsofsymfony/rest-bundle": "*",
         "symfony/test-pack": "^1.0",
         "symfony/process": "^6.4",