build(deps-dev): update coverage requirement from ^6.4.2 to ^7.2.7

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](nedbat/coveragepy@6.4.2...7.2.7)

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

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

pyproject.toml

@@ -24,7 +24,7 @@ misaka = "~2.1.1"
 Pygments = "~2.15.1"
 
 [tool.poetry.dev-dependencies]
-coverage = "^6.4.2"
+coverage = "^7.2.7"
 tox = "^3.25.1"
 Django = [
     { version = "~3.2.14", python = "^3.7" },