astroid 2.13.0

on Python PyPI

Fixed importing of modules that have the same name as the file that is importing.
astroid will now correctly handle an import math statement in a file called math.py
by relying on the import system.

Refs PyCQA/pylint#5151

Create ContextManagerModel and let GeneratorModel inherit from it.

Refs PyCQA/pylint#2567

Added a regex brain.

Refs PyCQA/pylint#1911

Support "is None" constraints from if statements during inference.

Refs #791
Refs PyCQA/pylint#157
Refs PyCQA/pylint#1472
Refs PyCQA/pylint#2016
Refs PyCQA/pylint#2631
Refs PyCQA/pylint#2880