Update pytest to 3.7.1

[pyup-bot]

This PR updates pytest from 3.7.0 to 3.7.1.

Changelog

3.7.1

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

Bug Fixes
---------

- `3473 <https://github.com/pytest-dev/pytest/issues/3473>`_: Raise immediately if ``approx()`` is given an expected value of a type it doesn't understand (e.g. strings, nested dicts, etc.).


- `3712 <https://github.com/pytest-dev/pytest/issues/3712>`_: Correctly represent the dimensions of an numpy array when calling ``repr()`` on ``approx()``.

- `3742 <https://github.com/pytest-dev/pytest/issues/3742>`_: Fix incompatibility with third party plugins during collection, which produced the error ``object has no attribute '_collectfile'``.

- `3745 <https://github.com/pytest-dev/pytest/issues/3745>`_: Display the absolute path if ``cache_dir`` is not relative to the ``rootdir`` instead of failing.


- `3747 <https://github.com/pytest-dev/pytest/issues/3747>`_: Fix compatibility problem with plugins and the warning code issued by fixture functions when they are called directly.


- `3748 <https://github.com/pytest-dev/pytest/issues/3748>`_: Fix infinite recursion in ``pytest.approx`` with arrays in ``numpy<1.13``.


- `3757 <https://github.com/pytest-dev/pytest/issues/3757>`_: Pin pathlib2 to ``>=2.2.0`` as we require ``__fspath__`` support.


- `3763 <https://github.com/pytest-dev/pytest/issues/3763>`_: Fix ``TypeError`` when the assertion message is ``bytes`` in python 3.

Links

• PyPI: https://pypi.org/project/pytest
• Changelog: https://pyup.io/changelogs/pytest/
• Repo: https://github.com/pytest-dev/pytest/issues
• Homepage: http:https://pytest.org