Adding some typehint

[ThomasLandauer]

A (more or less) useful by-product while trying the workflow of https://github.com/TavoNiievez/module-symfony/pull/1

[TavoNiievez]

Hmm..

This was already fixed in #41, apparently the master branch of your fork is out of date 75 commits behind the master branch of this project.

Keep in mind that changes should always be made based on the master of this project.

The solution in these cases is that always, before making a change, run:

# This step once:
git remote add upstream https://github.com/Codeception/module-symfony.git

# These always:
git pull upstream master
git rebase upstream/master

So that you synchronize the master branch of your fork with the master of this project.

Maybe this should be added to the contribution guides?

I'm closing this as the change in question is already included.