Update dependency pytest-cov to v6

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This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
pytest-cov (changelog)	^4.1.0 -> ^6.3.0

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Release Notes

pytest-dev/pytest-cov (pytest-cov)

v6.3.0

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• Added support for markdown reports.
  Contributed by Marcos Boger in #&#8203;712 <https://github.com/pytest-dev/pytest-cov/pull/712>_
  and #&#8203;714 <https://github.com/pytest-dev/pytest-cov/pull/714>_.
• Fixed some formatting issues in docs.
  Anonymous contribution in #&#8203;706 <https://github.com/pytest-dev/pytest-cov/pull/706>_.

v6.2.1

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• Added a version requirement for pytest's pluggy dependency (1.2.0, released 2023-06-21) that has the required new-style hookwrapper API.

• Removed deprecated license classifier (packaging).

• Disabled coverage warnings in two more situations where they have no value:

  • "module-not-measured" in workers
  • "already-imported" in subprocesses

v6.2.0

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• The plugin now adds 3 rules in the filter warnings configuration to prevent common coverage warnings being raised as obscure errors::

  default:unclosed database in <sqlite3.Connection object at:ResourceWarning
  once::PytestCovWarning
  once::CoverageWarning

  This fixes most of the bad interactions that are occurring on pytest 8.4 with filterwarnings=error.

  The plugin will check if there already matching rules for the 3 categories
  (ResourceWarning, PytestCovWarning, CoverageWarning) and message (unclosed database in <sqlite3.Connection object at) before adding the filters.

  This means you can have this in your pytest configuration for complete oblivion (not recommended, if that is not clear)::

  filterwarnings = [
  "error",
  "ignore:unclosed database in <sqlite3.Connection object at:ResourceWarning",
  "ignore::PytestCovWarning",
  "ignore::CoverageWarning",
  ]

v6.1.1

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• Fixed breakage that occurs when --cov-context and the no_cover marker are used together.

v6.1.0

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• Change terminal output to use full width lines for the coverage header.
  Contributed by Tsvika Shapira in #&#8203;678 <https://github.com/pytest-dev/pytest-cov/pull/678>_.
• Removed unnecessary CovFailUnderWarning. Fixes #&#8203;675 <https://github.com/pytest-dev/pytest-cov/issues/675>_.
• Fixed the term report not using the precision specified via --cov-precision.

v6.0.0

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• Updated various documentation inaccuracies, especially on subprocess handling.
• Changed fail under checks to use the precision set in the coverage configuration.
  Now it will perform the check just like coverage report would.
• Added a --cov-precision cli option that can override the value set in your coverage configuration.
• Dropped support for now EOL Python 3.8.

v5.0.0

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• Removed support for xdist rsync (now deprecated).
  Contributed by Matthias Reichenbach in #&#8203;623 <https://github.com/pytest-dev/pytest-cov/pull/623>_.
• Switched docs theme to Furo.
• Various legacy Python cleanup and CI improvements.
  Contributed by Christian Clauss and Hugo van Kemenade in
  #&#8203;630 <https://github.com/pytest-dev/pytest-cov/pull/630>,
  #&#8203;631 <https://github.com/pytest-dev/pytest-cov/pull/631>,
  #&#8203;632 <https://github.com/pytest-dev/pytest-cov/pull/632>_ and
  #&#8203;633 <https://github.com/pytest-dev/pytest-cov/pull/633>_.
• Added a pyproject.toml example in the docs.
  Contributed by Dawn James in #&#8203;626 <https://github.com/pytest-dev/pytest-cov/pull/626>_.
• Modernized project's pre-commit hooks to use ruff. Initial POC contributed by
  Christian Clauss in #&#8203;584 <https://github.com/pytest-dev/pytest-cov/pull/584>_.
• Dropped support for Python 3.7.

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