Add missing dependency

Author: jderusse

composer.json

@@ -19,6 +19,7 @@
         "php": ">=7.2.5",
         "egulias/email-validator": "^2.1.10|^3",
         "psr/log": "~1.0",
+        "symfony/deprecation-contracts": "^2.1",
         "symfony/event-dispatcher": "^4.4|^5.0",
         "symfony/mime": "^5.2.6",
         "symfony/polyfill-php80": "^1.15",