root_dir is deprecated, use project_dir

[tacman]

see https://symfony.com/blog/new-in-symfony-4-2-important-deprecations#deprecated-the-kernel-name-and-the-root-dir

[tobias-93]

Hi @tacman,
Thanks for your effort, however you did not fix the problem adequately (you forgot to bump the SF version to a version where project_dir exists, and project_dir and root_dir have different behaviors).
I'm closing this in favour of #369.
Regards, Tobias