Bump coverage from 7.3.4 to 7.4.0

Bumps [coverage](https://github.com/nedbat/coveragepy) from 7.3.4 to 7.4.0.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@7.3.4...7.4.0)

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

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

Pipfile

@@ -11,7 +11,7 @@ webtest = "==3"
 [dev-packages]
 towncrier = "==23.11.0"
 pytest-cov = "==4.1.0"
-coverage = "==7.3.4"
+coverage = "==7.4.0"
 mypy = "==1.8.0"
 black = "==23.12.1"
 tbump = "==6.11.0"