Update pytest to 5.1.2

[pyup-bot]

This PR updates pytest from 5.1.1 to 5.1.2.

Changelog

5.1.2

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

Bug Fixes
---------

- `2270 <https://github.com/pytest-dev/pytest/issues/2270>`_: Fixed ``self`` reference in function-scoped fixtures defined plugin classes: previously ``self``
would be a reference to a *test* class, not the *plugin* class.


- `570 <https://github.com/pytest-dev/pytest/issues/570>`_: Fixed long standing issue where fixture scope was not respected when indirect fixtures were used during
parametrization.


- `5782 <https://github.com/pytest-dev/pytest/issues/5782>`_: Fix decoding error when printing an error response from ``--pastebin``.


- `5786 <https://github.com/pytest-dev/pytest/issues/5786>`_: Chained exceptions in test and collection reports are now correctly serialized, allowing plugins like
``pytest-xdist`` to display them properly.


- `5792 <https://github.com/pytest-dev/pytest/issues/5792>`_: Windows: Fix error that occurs in certain circumstances when loading
``conftest.py`` from a working directory that has casing other than the one stored
in the filesystem (e.g., ``c:\test`` instead of ``C:\test``).

Links

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