The package debril/feed-io is marked as abandoned and has been replaced by php-feed-io/feed-io:
https://packagist.org/packages/php-feed-io/feed-io
As far as I can tell, it’s the same package, now maintained under the organization account rather than the original developer.
Could you please update the bundle to depend on the new package instead?
This will prevent Composer from showing deprecation warnings and ensure future updates work properly.