Update pytest to 6.2.4

[pyup-bot]

This PR updates pytest from 6.2.2 to 6.2.4.

Changelog

6.2.4

=========================

Bug Fixes
---------

- `8539 <https://github.com/pytest-dev/pytest/issues/8539>`_: Fixed assertion rewriting on Python 3.10.

6.2.3

=========================

Bug Fixes
---------

- `8414 <https://github.com/pytest-dev/pytest/issues/8414>`_: pytest used to create directories under ``/tmp`` with world-readable
permissions. This means that any user in the system was able to read
information written by tests in temporary directories (such as those created by
the ``tmp_path``/``tmpdir`` fixture). Now the directories are created with
private permissions.

pytest used to silenty use a pre-existing ``/tmp/pytest-of-<username>`` directory,
even if owned by another user. This means another user could pre-create such a
directory and gain control of another user's temporary directory. Now such a
condition results in an error.

Links

• PyPI: https://pypi.org/project/pytest
• Changelog: https://pyup.io/changelogs/pytest/
• Homepage: https://docs.pytest.org/en/latest/

[coveralls]

Coverage remained the same at 86.413% when pulling fb55423 on pyup-update-pytest-6.2.2-to-6.2.4 into 2a4f993 on master.