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* **breaking changes**
* :class:`client.Client` now uses ``http_auth=(username, password)`` as authentication parameter
* for all ResourcesT like :class:`tickets.Tickets` ``.url`` is now a property
* exchange ``tickets.Ticket.merge_with()`` with :meth:`tickets.Ticket.merge_into()`
mimicking the logic provided by the Web UI
* :meth:`tags.Tags.delete()` and :meth:`tags.Tags.rename()` now only accept the tag name
* changed signature of :meth:`tickets.Tickets.create()` to assure an article body or the article itself is provided
* remove :attr:`articles.Article.encoding` property
* **added features**
* extend supported Python version including Python 3.8
* added :meth:`tickets.Ticket.history` method
* added ``weburl`` property for :class:`client.Client`, :class:`tickets.Ticket`,
:class:`users.User` and :class:`organizations.Organization`
* added property :attr:`tickets.Ticket.create_article_sender`
* added property :attr:`groups.Group.parent_group`
* save timestamp when cache is updated, added method :meth:`tickets.Ticket.last_request_at`
* ``dir(Resource)`` now also returns the dynamic attributes
* **fixes**
* resource items are now cached when using iteration
* fromisoformat conversion in Python <3.10 supporting Zulu offset format
* :class:`roles.Roles` and :class:`groups.Groups` wrongly supported `search`
* use :attr:`requests.Response.apparent_encoding` when returning attachment content as text