chore(deps-dev): Update coverage requirement from ~=6.5 to ~=7.0 (#1834)

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@6.5.0...7.0.0)

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

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requirements/dev.txt

@@ -4,7 +4,7 @@ pytest~=7.2.0
 pytest-asyncio~=0.20.3
 # pytest-order~=1.0.1
 mypy~=0.991
-coverage~=6.5
+coverage~=7.0
 pre-commit==2.20.0
 codespell==2.2.2
 bandit==1.7.4