use event to override vote on task

Now, the bundle dispatch an event `chill_task.vote` to override the authorization
on voting on a task.

If a subscriber or listener emits a vote on the event, this vote override the
logic defined for the default task.

Resources/config/services/security.yml

@@ -4,6 +4,7 @@ services:
         arguments:
             - "@security.access.decision_manager"
             - "@chill.main.security.authorization.helper"
+            - '@Symfony\Component\EventDispatcher\EventDispatcherInterface'
             - "@logger"
         tags:
             - { name: security.voter }