Social Task Assignment sends notifications to blocked users

Problem/Motivation

Users will get notification e-Mails even if they are blocked.

"Dear [username]! A task organizer has changed a date for Cooperation Project 3/3"

Steps to reproduce

- block a user
- assign him a task
- change the date for this task

Proposed resolution

- make sure blocked users get no notification emails

the code is located somewhere here:

grep -R "A task organizer has changed a date for"
social_task_assignment/src/Plugin/QueueWorker/TaskAssignmentMailQueueProcessor.php:    $body_text = $this->t('Dear @user! A task organizer has changed a date for @task', [