Updating branch alias to v1.19 (#433)

Co-authored-by: GitHub <noreply@github.com>

Author: github-actions[bot]

composer.json

@@ -54,7 +54,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-main": "v1.18-dev"
+            "dev-main": "v1.19-dev"
         }
     }
 }