Update astroid to 2.8.0

[pyup-bot]

This PR updates astroid from 2.7.3 to 2.8.0.

Changelog

2.8.0

============================
Release date: 2021-09-14

* Add additional deprecation warnings in preparation for astroid 3.0

* Require attributes for some node classes with ``__init__`` call.

 * ``name`` (``str``) for ``Name``, ``AssignName``, ``DelName``
 * ``attrname`` (``str``) for ``Attribute``, ``AssignAttr``, ``DelAttr``
 * ``op`` (``str``) for ``AugAssign``, ``BinOp``, ``BoolOp``, ``UnaryOp``
 * ``names`` (``list[tuple[str, str | None]]``) for ``Import``

* Support pyz imports

Closes PyCQA/pylint3887

* Add ``node_ancestors`` method to ``NodeNG`` for obtaining the ancestors of nodes.

* It's now possible to infer the value of comparison nodes

Closes 846

* Fixed bug in inference of dataclass field calls.

 Closes PyCQA/pylint4963

Links

• PyPI: https://pypi.org/project/astroid
• Changelog: https://pyup.io/changelogs/astroid/
• Repo: https://github.com/PyCQA/astroid

[pyup-bot]

Closing this in favor of #414