Update dependency pytest-cov to v6.2.1 (#137)

* Update dependency pytest-cov to v6.2.1 for Python >= 3.9
* Keep using v5.0.0 for Python < 3.9

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Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Bart van Andel <bavanandel@gmail.com>

Author: renovate[bot]

requirements.txt

@@ -1,4 +1,4 @@
 pytest==8.3.5; python_version < '3.9'
 pytest==8.4.0; python_version >= '3.9'
 pytest-cov==5.0.0; python_version < '3.9'
-pytest-cov==6.1.0; python_version >= '3.9'
+pytest-cov==6.2.1; python_version >= '3.9'