Update dependency coverage to v7.8.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
coverage	==7.7.1 -> ==7.8.0

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Release Notes

nedbat/coveragepy (coverage)

v7.8.0

Compare Source

• Added a new source_dirs setting for symmetry with the existing
  source_pkgs setting. It's preferable to the existing source setting,
  because you'll get a clear error when directories don't exist. Fixes issue 1942. Thanks, Jeremy Fleischman <pull 1943_>.

• Fix: the PYTHONSAFEPATH environment variable new in Python 3.11 is properly
  supported, closing issue 1696. Thanks, Philipp A. <pull 1700_>. This
  works properly except for a detail when using the coverage command on
  Windows. There you can use python -m coverage instead if you need exact
  emulation.

.. _issue 1696:https://github.com/nedbat/coveragepy/issues/16966
.. _pull 1700https://github.com/nedbat/coveragepy/pull/170000
.. _issue 194https://github.com/nedbat/coveragepy/issues/1942942
.. _pull 19https://github.com/nedbat/coveragepy/pull/19431943

.. _changes_7-7-1:

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