---

features:
    - |
       New function, called tasks, available from within an expression (Yaql,
       Jinja2). This function allows to filter all tasks of a user by workflow
       execution id and/or state. In addition it is possible to get tasks
       recursively and flatten the tasks list.

Add reno for tasks function
Add reno for tasks function

Documentation on how to use should also be added.

Change-Id: I6a2c4c08042cd2e8546c7117c0c02cbcb4f1da53
