[deps] Update coverage requirement from ~=7.6.1 to >=7.6.1,<7.9.0

Updates the requirements on [coverage](https://github.com/nedbat/coveragepy) to permit the latest version.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](coveragepy/coveragepy@7.6.1...7.8.0)

---
updated-dependencies:
- dependency-name: coverage
  dependency-version: 7.8.0
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

setup.py

@@ -37,7 +37,7 @@
             'black~=23.12.1',
             'flake8~=7.1.0',
             'isort~=5.13.2',
-            'coverage~=7.6.1',
+            'coverage>=7.6.1,<7.9.0',
             'tblib~=3.0.0',
             'docstrfmt~=1.8.0',
         ],