Bump coverage from 6.5.0 to 7.4.4

Bumps [coverage](https://github.com/nedbat/coveragepy) from 6.5.0 to 7.4.4.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@6.5.0...7.4.4)

---
updated-dependencies:
- dependency-name: coverage
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

pyproject.toml

@@ -91,7 +91,7 @@ sphinx-rtd-theme = ">=1.0,<2.1"
 sphinx-panels = "~0.6"
 
 [tool.poetry.group.coverage.dependencies]
-coverage = "~6" # coveralls needs ~6 even though 7.3.2 is latest
+coverage = ">=6,<8" # coveralls needs ~6 even though 7.3.2 is latest
 coveralls = ">=3,<5"
 
 [tool.poetry.group.lint.dependencies]