Could not update to V3 with the script

[jeremyvienney]

Hi @kuzmany !

Thanks you for this upgrade script, I'm trying to upgrade an instance with multiple plugin to last version 3.3.1, but I'm stuck on 2.16.5 when I try to upgrade with your multiple-upgrade script.
I tried to check with this command :
php app/console mautic:multiple:run --command="mautic:update:find"
And maybe then run
php app/console mautic:multiple:run --command="php upgrade_v3.php"
But I'm not sure it will succeed and work correctly after the migration.
What do you recommand to me to upgrade to V3 ?