feat(configuration) : tasks node validation

[jvancoillie]

Q	A
PHP version?	7.4
Bundle version?	0.4.2
New feature?	yes
Bug fix?	no
Discussion?	# ...

Improve the validation of the configuration.

I would like to implement validation on the definition of tasks in the application. Before going further, I realized that it was possible to simplify the configuration of subtasks while keeping the same operation as the basic tasks.

I don't want to upset your plans and I don't know if I'm doing the right thing by proposing this PR but I find this bundle very useful and I'm happy to be able to give a hand.

If you think it's derogatory, don't hesitate to let me know.

[Guikingone]

Hi @jvancoillie 👋🏻

No problem for working on this, feel free to work, submit and open discussions, this bundle is also a community one 🙂

[jvancoillie]

I proposed a validation on the configuration. I have trouble seeing how to set up a recursive on the subtasks. did you take a look? any remarks or suggestion?

[Guikingone]

I'm gonna review it tonight or tomorrow 🙂