Log Message:
py-test-cov: update to 3.0.0.

3.0.0 (2021-10-04)
-------------------

**Note that this release drops support for Python 2.7 and Python 3.5.**

* Added support for Python 3.10 and updated various test dependencies.
  Contributed by Hugo van Kemenade in
  `#500 <https://github.com/pytest-dev/pytest-cov/pull/500>`_.
* Switched from Travis CI to GitHub Actions. Contributed by Hugo van Kemenade in
  `#494 <https://github.com/pytest-dev/pytest-cov/pull/494>`_ and
  `#495 <https://github.com/pytest-dev/pytest-cov/pull/495>`_.
* Add a ``--cov-reset`` CLI option.
  Contributed by Danilo Šegan in
  `#459 <https://github.com/pytest-dev/pytest-cov/pull/459>`_.
* Improved validation of ``--cov-fail-under`` CLI option.
  Contributed by ... Ronny Pfannschmidt's desire for skark in
  `#480 <https://github.com/pytest-dev/pytest-cov/pull/480>`_.
* Dropped Python 2.7 support.
  Contributed by Thomas Grainger in
  `#488 <https://github.com/pytest-dev/pytest-cov/pull/488>`_.
* Updated trove classifiers. Contributed by Michał Bielawski in
  `#481 <https://github.com/pytest-dev/pytest-cov/pull/481>`_.

2.13.0 (2021-06-01)
-------------------

* Changed the `toml` requirement to be always be directly required (instead of \ 
being required through a coverage extra).
  This fixes issues with pip-compile (`pip-tools#1300 \ 
<https://github.com/jazzband/pip-tools/issues/1300>`_).
  Contributed by Sorin Sbarnea in `#472 \ 
<https://github.com/pytest-dev/pytest-cov/pull/472>`_.
* Documented ``show_contexts``.
  Contributed by Brian Rutledge in `#473 \ 
<https://github.com/pytest-dev/pytest-cov/pull/473>`_.