Update pytest-cov requirement from ~3 to ~4

[dependabot]

Updates the requirements on pytest-cov to permit the latest version.

Changelog

Sourced from pytest-cov's changelog.

4.1.0 (2023-05-24)

• Updated CI with new Pythons and dependencies.
• Removed rsyncdir support. This makes pytest-cov compatible with xdist 3.0. Contributed by Sorin Sbarnea in [#558](https://github.com/pytest-dev/pytest-cov/issues/558) <https://github.com/pytest-dev/pytest-cov/pull/558>_.
• Optimized summary generation to not be performed if no reporting is active (for example, when --cov-report='' is used without --cov-fail-under). Contributed by Jonathan Stewmon in [#589](https://github.com/pytest-dev/pytest-cov/issues/589) <https://github.com/pytest-dev/pytest-cov/pull/589>_.
• Added support for JSON reporting. Contributed by Matthew Gamble in [#582](https://github.com/pytest-dev/pytest-cov/issues/582) <https://github.com/pytest-dev/pytest-cov/pull/582>_.
• Refactored code to use f-strings. Contributed by Mark Mayo in [#572](https://github.com/pytest-dev/pytest-cov/issues/572) <https://github.com/pytest-dev/pytest-cov/pull/572>_.
• Fixed a skip in the test suite for some old xdist. Contributed by a bunch of people in [#565](https://github.com/pytest-dev/pytest-cov/issues/565) <https://github.com/pytest-dev/pytest-cov/pull/565>_.

4.0.0 (2022-09-28)

Note that this release drops support for multiprocessing.

• --cov-fail-under no longer causes pytest --collect-only to fail Contributed by Zac Hatfield-Dodds in [#511](https://github.com/pytest-dev/pytest-cov/issues/511) <https://github.com/pytest-dev/pytest-cov/pull/511>_.

• Dropped support for multiprocessing (mostly because issue 82408 <https://github.com/python/cpython/issues/82408>_). This feature was mostly working but very broken in certain scenarios and made the test suite very flaky and slow.

  There is builtin multiprocessing support in coverage and you can migrate to that. All you need is this in your .coveragerc::

  [run] concurrency = multiprocessing parallel = true sigterm = true

• Fixed deprecation in setup.py by trying to import setuptools before distutils. Contributed by Ben Greiner in [#545](https://github.com/pytest-dev/pytest-cov/issues/545) <https://github.com/pytest-dev/pytest-cov/pull/545>_.

• Removed undesirable new lines that were displayed while reporting was disabled. Contributed by Delgan in [#540](https://github.com/pytest-dev/pytest-cov/issues/540) <https://github.com/pytest-dev/pytest-cov/pull/540>_.

• Documentation fixes. Contributed by Andre Brisco in [#543](https://github.com/pytest-dev/pytest-cov/issues/543) <https://github.com/pytest-dev/pytest-cov/pull/543>_ and Colin O'Dell in [#525](https://github.com/pytest-dev/pytest-cov/issues/525) <https://github.com/pytest-dev/pytest-cov/pull/525>_.

• Added support for LCOV output format via --cov-report=lcov. Only works with coverage 6.3+. Contributed by Christian Fetzer in [#536](https://github.com/pytest-dev/pytest-cov/issues/536) <https://github.com/pytest-dev/pytest-cov/issues/536>_.

• Modernized pytest hook implementation. Contributed by Bruno Oliveira in [#549](https://github.com/pytest-dev/pytest-cov/issues/549) <https://github.com/pytest-dev/pytest-cov/pull/549>_ and Ronny Pfannschmidt in [#550](https://github.com/pytest-dev/pytest-cov/issues/550) <https://github.com/pytest-dev/pytest-cov/pull/550>_.

3.0.0 (2021-10-04)

... (truncated)

Commits

• 2c9f217 Bump version: 4.0.0 → 4.1.0
• 4d245df Update changelog and authors.
• 7b095c8 Skip starting from xdist 3.0.2 (where boxed was removed).
• 605d690 disabling boxed test if version xdist newer than 2.5.0
• 76fb2a6 introduced f-strings
• 0d63ede Update test config. Reapply some of the changes from PR567 to the right file ...
• f3d8d83 Add support for JSON reporter
• dec02ab Update test deps.
• 88a7d34 chore: update AUTHORS and CHANGELOG
• 74eb4cc perf: only call summary when the report will be used
• Additional commits viewable in compare view

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[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (bd97657) 35.10% compared to head (152e3c9) 35.10%.
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #55   +/-   ##
=======================================
  Coverage   35.10%   35.10%           
=======================================
  Files          26       26           
  Lines        1054     1054           
=======================================
  Hits          370      370           
  Misses        684      684           

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