Update pytest to 3.6.3

[pyup-bot]

This PR updates pytest from 3.6.1 to 3.6.3.

Changelog

### 3.6.2 ``` ========================= Bug Fixes --------- - Fix regression in ``Node.add_marker`` by extracting the mark object of a ``MarkDecorator``. (`3555 <https://github.com/pytest-dev/pytest/issues/3555>`_) - Warnings without ``location`` were reported as ``None``. This is corrected to now report ``<undetermined location>``. (`3563 <https://github.com/pytest-dev/pytest/issues/3563>`_) - Continue to call finalizers in the stack when a finalizer in a former scope raises an exception. (`3569 <https://github.com/pytest-dev/pytest/issues/3569>`_) - Fix encoding error with `print` statements in doctests (`3583 <https://github.com/pytest-dev/pytest/issues/3583>`_) Improved Documentation ---------------------- - Add documentation for the ``--strict`` flag. (`3549 <https://github.com/pytest-dev/pytest/issues/3549>`_) Trivial/Internal Changes ------------------------ - Update old quotation style to parens in fixture.rst documentation. (`3525 <https://github.com/pytest-dev/pytest/issues/3525>`_) - Improve display of hint about ``--fulltrace`` with ``KeyboardInterrupt``. (`3545 <https://github.com/pytest-dev/pytest/issues/3545>`_) - pytest's testsuite is no longer runnable through ``python setup.py test`` -- instead invoke ``pytest`` or ``tox`` directly. (`3552 <https://github.com/pytest-dev/pytest/issues/3552>`_) - Fix typo in documentation (`3567 <https://github.com/pytest-dev/pytest/issues/3567>`_) ```

Links

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

[coveralls]

Pull Request Test Coverage Report for Build 566

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 3 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.07%) to 97.889%

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Files with Coverage Reduction	New Missed Lines	%
astrality/module.py	3	97.38%
<!--	Total:	3		-->

Totals
Change from base Build 553:	-0.07%
Covered Lines:	4405
Relevant Lines:	4500

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💛 - Coveralls

[pyup-bot]

Closing this in favor of #74