Update pytest to 3.8.1

[pyup-bot]

This PR updates pytest from 3.7.4 to 3.8.1.

Changelog

3.8.1

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

Bug Fixes
---------

- `3286 <https://github.com/pytest-dev/pytest/issues/3286>`_: ``.pytest_cache`` directory is now automatically ignored by Git. Users who would like to contribute a solution for other SCMs please consult/comment on this issue.


- `3749 <https://github.com/pytest-dev/pytest/issues/3749>`_: Fix the following error during collection of tests inside packages::

   TypeError: object of type 'Package' has no len()


- `3941 <https://github.com/pytest-dev/pytest/issues/3941>`_: Fix bug where indirect parametrization would consider the scope of all fixtures used by the test function to determine the parametrization scope, and not only the scope of the fixtures being parametrized.


- `3973 <https://github.com/pytest-dev/pytest/issues/3973>`_: Fix crash of the assertion rewriter if a test changed the current working directory without restoring it afterwards.


- `3998 <https://github.com/pytest-dev/pytest/issues/3998>`_: Fix issue that prevented some caplog properties (for example ``record_tuples``) from being available when entering the debugger with ``--pdb``.


- `3999 <https://github.com/pytest-dev/pytest/issues/3999>`_: Fix ``UnicodeDecodeError`` in python2.x when a class returns a non-ascii binary ``__repr__`` in an assertion which also contains non-ascii text.



Improved Documentation
----------------------

- `3996 <https://github.com/pytest-dev/pytest/issues/3996>`_: New `Deprecations and Removals <https://docs.pytest.org/en/latest/deprecations.html>`_ page shows all currently
deprecated features, the rationale to do so, and alternatives to update your code. It also list features removed
from pytest in past major releases to help those with ancient pytest versions to upgrade.



Trivial/Internal Changes
------------------------

- `3955 <https://github.com/pytest-dev/pytest/issues/3955>`_: Improve pre-commit detection for changelog filenames


- `3975 <https://github.com/pytest-dev/pytest/issues/3975>`_: Remove legacy code around im_func as that was python2 only

3.8.0

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

Deprecations and Removals
-------------------------

- `2452 <https://github.com/pytest-dev/pytest/issues/2452>`_: ``Config.warn`` and ``Node.warn`` have been
deprecated, see `<https://docs.pytest.org/en/latest/deprecations.htmlconfig-warn-and-node-warn>`_ for rationale and
examples.

- `3936 <https://github.com/pytest-dev/pytest/issues/3936>`_: ``pytest.mark.filterwarnings`` second parameter is no longer regex-escaped,
making it possible to actually use regular expressions to check the warning message.

**Note**: regex-escaping the match string was an implementation oversight that might break test suites which depend
on the old behavior.



Features
--------

- `2452 <https://github.com/pytest-dev/pytest/issues/2452>`_: Internal pytest warnings are now issued using the standard ``warnings`` module, making it possible to use
the standard warnings filters to manage those warnings. This introduces ``PytestWarning``,
``PytestDeprecationWarning`` and ``RemovedInPytest4Warning`` warning types as part of the public API.

Consult `the documentation <https://docs.pytest.org/en/latest/warnings.htmlinternal-pytest-warnings>`_ for more info.


- `2908 <https://github.com/pytest-dev/pytest/issues/2908>`_: ``DeprecationWarning`` and ``PendingDeprecationWarning`` are now shown by default if no other warning filter is
configured. This makes pytest more compliant with
`PEP-0506 <https://www.python.org/dev/peps/pep-0565/recommended-filter-settings-for-test-runners>`_. See
`the docs <https://docs.pytest.org/en/latest/warnings.htmldeprecationwarning-and-pendingdeprecationwarning>`_ for
more info.


- `3251 <https://github.com/pytest-dev/pytest/issues/3251>`_: Warnings are now captured and displayed during test collection.


- `3784 <https://github.com/pytest-dev/pytest/issues/3784>`_: ``PYTEST_DISABLE_PLUGIN_AUTOLOAD`` environment variable disables plugin auto-loading when set.


- `3829 <https://github.com/pytest-dev/pytest/issues/3829>`_: Added the ``count`` option to ``console_output_style`` to enable displaying the progress as a count instead of a percentage.


- `3837 <https://github.com/pytest-dev/pytest/issues/3837>`_: Added support for 'xfailed' and 'xpassed' outcomes to the ``pytester.RunResult.assert_outcomes`` signature.



Bug Fixes
---------

- `3911 <https://github.com/pytest-dev/pytest/issues/3911>`_: Terminal writer now takes into account unicode character width when writing out progress.


- `3913 <https://github.com/pytest-dev/pytest/issues/3913>`_: Pytest now returns with correct exit code (EXIT_USAGEERROR, 4) when called with unknown arguments.


- `3918 <https://github.com/pytest-dev/pytest/issues/3918>`_: Improve performance of assertion rewriting.



Improved Documentation
----------------------

- `3566 <https://github.com/pytest-dev/pytest/issues/3566>`_: Added a blurb in usage.rst for the usage of -r flag which is used to show an extra test summary info.


- `3907 <https://github.com/pytest-dev/pytest/issues/3907>`_: Corrected type of the exceptions collection passed to ``xfail``: ``raises`` argument accepts a ``tuple`` instead of ``list``.



Trivial/Internal Changes
------------------------

- `3853 <https://github.com/pytest-dev/pytest/issues/3853>`_: Removed ``"run all (no recorded failures)"`` message printed with ``--failed-first`` and ``--last-failed`` when there are no failed tests.

Links

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

[pyup-bot]

Closing this in favor of #40