Update dependency pytest-cov to v3

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
pytest-cov	^2.12.1 -> ^3.0.0

---

Release Notes

pytest-dev/pytest-cov

v3.0.0

Compare Source

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
  #&#8203;500 <https://github.com/pytest-dev/pytest-cov/pull/500>_.
• Switched from Travis CI to GitHub Actions. Contributed by Hugo van Kemenade in
  #&#8203;494 <https://github.com/pytest-dev/pytest-cov/pull/494>_ and
  #&#8203;495 <https://github.com/pytest-dev/pytest-cov/pull/495>_.
• Add a --cov-reset CLI option.
  Contributed by Danilo Šegan in
  #&#8203;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
  #&#8203;480 <https://github.com/pytest-dev/pytest-cov/pull/480>_.
• Dropped Python 2.7 support.
  Contributed by Thomas Grainger in
  #&#8203;488 <https://github.com/pytest-dev/pytest-cov/pull/488>_.
• Updated trove classifiers. Contributed by Michał Bielawski in
  #&#8203;481 <https://github.com/pytest-dev/pytest-cov/pull/481>_.

---

Configuration

📅 Schedule: At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box.

---

This PR has been generated by WhiteSource Renovate. View repository job log here.

[codecov]

Codecov Report

Merging #27 (c4b8ff8) into main (055bfb0) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #27   +/-   ##
=======================================
  Coverage   93.90%   93.90%           
=======================================
  Files           8        8           
  Lines        1133     1133           
=======================================
  Hits         1064     1064           
  Misses         69       69           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 055bfb0...c4b8ff8. Read the comment docs.