Update dependency pytest-cov to v2.8.0

[renovate]

This PR contains the following updates:

Package	Update	Change
pytest-cov	minor	==2.7.1 -> ==2.8.0

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Release Notes

pytest-dev/pytest-cov

v2.8.0

Compare Source

• Fixed RecursionError that can occur when using
  cleanup_on_signal <https://pytest-cov.readthedocs.io/en/latest/subprocess-support.html#if-you-got-custom-signal-handling>** or
  cleanup_on_sigterm <https://pytest-cov.readthedocs.io/en/latest/subprocess-support.html#if-you-got-custom-signal-handling>**.
  See: #&#8203;294 <https://github.com/pytest-dev/pytest-cov/issues/294>_.
  The 2.7.x releases of pytest-cov should be considered broken regarding aforementioned cleanup API.
• Added compatibility with future xdist release that deprecates some internals
  (match pytest-xdist master/worker terminology).
  Contributed by Thomas Grainger in #&#8203;321 <https://github.com/pytest-dev/pytest-cov/pull/321>_
• Fixed breakage that occurs when multiple reporting options are used.
  Contributed by Thomas Grainger in #&#8203;338 <https://github.com/pytest-dev/pytest-cov/pull/338>_.
• Changed internals to use a stub instead of os.devnull.
  Contributed by Thomas Grainger in #&#8203;332 <https://github.com/pytest-dev/pytest-cov/pull/332>_.
• Added support for Coverage 5.0.
  Contributed by Ned Batchelder in #&#8203;319 <https://github.com/pytest-dev/pytest-cov/pull/319>_.
• Added support for float values in --cov-fail-under.
  Contributed by Martín Gaitán in #&#8203;311 <https://github.com/pytest-dev/pytest-cov/pull/311>_.
• Various documentation fixes. Contributed by
  Juanjo Bazán,
  Andrew Murray and
  Albert Tugushev in
  #&#8203;298 <https://github.com/pytest-dev/pytest-cov/pull/298>,
  #&#8203;299 <https://github.com/pytest-dev/pytest-cov/pull/299> and
  #&#8203;307 <https://github.com/pytest-dev/pytest-cov/pull/307>_.
• Various testing improvements. Contributed by
  Ned Batchelder,
  Daniel Hahler,
  Ionel Cristian Mărieș and
  Hugo van Kemenade in
  #&#8203;313 <https://github.com/pytest-dev/pytest-cov/pull/313>,
  #&#8203;314 <https://github.com/pytest-dev/pytest-cov/pull/314>,
  #&#8203;315 <https://github.com/pytest-dev/pytest-cov/pull/315>,
  #&#8203;316 <https://github.com/pytest-dev/pytest-cov/pull/316>,
  #&#8203;325 <https://github.com/pytest-dev/pytest-cov/pull/325>,
  #&#8203;326 <https://github.com/pytest-dev/pytest-cov/pull/326>,
  #&#8203;334 <https://github.com/pytest-dev/pytest-cov/pull/334>_ and
  #&#8203;335 <https://github.com/pytest-dev/pytest-cov/pull/335>_.
• Added the --cov-context CLI options that enables coverage contexts. Only works with coverage 5.0+.
  Contributed by Ned Batchelder in #&#8203;345 <https://github.com/pytest-dev/pytest-cov/pull/345>_.

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[codecov-io]

Codecov Report

Merging #51 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop      #51   +/-   ##
========================================
  Coverage    90.39%   90.39%           
========================================
  Files           11       11           
  Lines          177      177           
========================================
  Hits           160      160           
  Misses          17       17

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