Update pytest to 3.0.3

[pyup-bot]

There's a new version of pytest available.
You are currently using 3.0.1. I have updated it to 3.0.3

Changelog

3.0.3

• The ids argument to parametrize again accepts unicode strings
  in Python 2 (1905).
  Thanks philpep for the report and nicoddemus_ for the PR.
• Assertions are now being rewritten for plugins in development mode
  (pip install -e) (1934).
  Thanks nicoddemus for the PR.
• Fix pkg_resources import error in Jython projects (1853).
  Thanks raquel-ucl_ for the PR.
• Got rid of AttributeError: 'Module' object has no attribute '_obj' exception
  in Python 3 (1944).
  Thanks axil for the PR.
• Explain a bad scope value passed to fixture declarations or
  a MetaFunc.parametrize() call. Thanks tgoodlet_ for the PR.
• This version includes pluggy-0.4.0, which correctly handles
  VersionConflict errors in plugins (704).
  Thanks nicoddemus for the PR.

.. _philpep: https://github.com/philpep
.. _raquel-ucl: https://github.com/raquel-ucl
.. _axil: https://github.com/axil
.. _tgoodlet: https://github.com/tgoodlet

.. _1905: pytest-dev/pytest#1905
.. _1934: pytest-dev/pytest#1934
.. _1944: pytest-dev/pytest#1944
.. _704: pytest-dev/pytest#704

3.0.2

• Improve error message when passing non-string ids to pytest.mark.parametrize (1857).
  Thanks okken for the report and nicoddemus_ for the PR.
• Add buffer attribute to stdin stub class pytest.capture.DontReadFromInput
  Thanks joguSD_ for the PR.
• Fix UnicodeEncodeError when string comparison with unicode has failed. (1864)
  Thanks AiOO for the PR.
• pytest_plugins is now handled correctly if defined as a string (as opposed as
  a sequence of strings) when modules are considered for assertion rewriting.
  Due to this bug, much more modules were being rewritten than necessary
  if a test suite uses pytest_plugins to load internal plugins (1888).
  Thanks jaraco for the report and nicoddemus_ for the PR (1891_).
• Do not call tearDown and cleanups when running tests from
  unittest.TestCase subclasses with --pdb
  enabled. This allows proper post mortem debugging for all applications
  which have significant logic in their tearDown machinery (1890). Thanks
  mbyt for the PR.
• Fix use of deprecated getfuncargvalue method in the internal doctest plugin.
  Thanks ViviCoder_ for the report (1898_).

.. _joguSD: https://github.com/joguSD
.. _AiOO: https://github.com/AiOO
.. _mbyt: https://github.com/mbyt
.. _ViviCoder: https://github.com/ViviCoder

.. _1857: pytest-dev/pytest#1857
.. _1864: pytest-dev/pytest#1864
.. _1888: pytest-dev/pytest#1888
.. _1891: pytest-dev/pytest#1891
.. _1890: pytest-dev/pytest#1890
.. _1898: pytest-dev/pytest#1898

Got merge conflicts? Close this PR and delete the branch. I'll create a new PR for you.

Happy merging! 🤖