Update pytest-xdist to 1.25.0

[pyup-bot]

This PR updates pytest-xdist from 1.24.1 to 1.25.0.

Changelog

### 1.25.0 ``` ================================ Deprecations and Removals ------------------------- - `372 <https://github.com/pytest-dev/pytest-xdist/issues/372>`_: Pytest versions older than 3.6 are no longer supported. Features -------- - `373 <https://github.com/pytest-dev/pytest-xdist/issues/373>`_: Node setup information is hidden when pytest is run in quiet mode to reduce noise on many-core machines. - `388 <https://github.com/pytest-dev/pytest-xdist/issues/388>`_: ``mainargv`` is made available in ``workerinput`` from the host's ``sys.argv``. This can be used via ``request.config.workerinput["mainargv"]``. Bug Fixes --------- - `332 <https://github.com/pytest-dev/pytest-xdist/issues/332>`_: Fix report of module-level skips (``pytest.skip(reason, allow_module_level=True)``). - `378 <https://github.com/pytest-dev/pytest-xdist/issues/378>`_: Fix support for gevent monkeypatching - `384 <https://github.com/pytest-dev/pytest-xdist/issues/384>`_: pytest 4.1 support: ``ExceptionInfo`` API changes. - `390 <https://github.com/pytest-dev/pytest-xdist/issues/390>`_: pytest 4.1 support: ``pytest_logwarning`` hook removed. ```

Links

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

[codecov-io]

Codecov Report

Merging #4002 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #4002   +/-   ##
=======================================
  Coverage   78.58%   78.58%           
=======================================
  Files         102      102           
  Lines        2807     2807           
=======================================
  Hits         2206     2206           
  Misses        601      601

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