Update pytest-cov to 2.10.1

[pyup-bot]

This PR updates pytest-cov from 2.8.1 to 2.10.1.

Changelog

2.10.1

-------------------

* Support for ``pytest-xdist`` 2.0, which breaks compatibility with ``pytest-xdist`` before 1.22.3 (from 2017).
Contributed by Zac Hatfield-Dodds in `412 <https://github.com/pytest-dev/pytest-cov/pull/412>`_.
* Fixed the ``LocalPath has no attribute startswith`` failure that occurred when using the ``pytester`` plugin
in inline mode.

2.10.0

-------------------

* Improved the ``--no-cov`` warning. Now it's only shown if ``--no-cov`` is present before ``--cov``.
* Removed legacy pytest support. Changed ``setup.py`` so that ``pytest>=4.6`` is required.

2.9.0

------------------

* Fixed ``RemovedInPytest4Warning`` when using Pytest 3.10.
Contributed by Michael Manganiello in `354 <https://github.com/pytest-dev/pytest-cov/pull/354>`_.
* Made pytest startup faster when plugin not active by lazy-importing.
Contributed by Anders Hovmöller in `339 <https://github.com/pytest-dev/pytest-cov/pull/339>`_.
* Various CI improvements.
Contributed by Daniel Hahler in `363 <https://github.com/pytest-dev/pytest-cov/pull/>`_ and
`364 <https://github.com/pytest-dev/pytest-cov/pull/364>`_.
* Various Python support updates (drop EOL 3.4, test against 3.8 final).
Contributed by Hugo van Kemenade in
`336 <https://github.com/pytest-dev/pytest-cov/pull/336>`_ and
`367 <https://github.com/pytest-dev/pytest-cov/pull/367>`_.
* Changed ``--cov-append`` to always enable ``data_suffix`` (a coverage setting).
Contributed by Harm Geerts in
`387 <https://github.com/pytest-dev/pytest-cov/pull/387>`_.
* Changed ``--cov-append`` to handle loading previous data better
(fixes various path aliasing issues).
* Various other testing improvements, github issue templates, example updates.
* Fixed internal failures that are caused by tests that change the current working directory by
ensuring a consistent working directory when coverage is called.
See `306 <https://github.com/pytest-dev/pytest-cov/issues/306>`_ and
`coveragepy881 <https://github.com/nedbat/coveragepy/issues/881>`_

Links

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