chore(deps-dev): bump coverage from 7.2.2 to 7.2.3 in /requirements (#484)

Bumps [coverage](https://github.com/nedbat/coveragepy) from 7.2.2 to 7.2.3.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@7.2.2...7.2.3)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements/dev.txt

@@ -1,4 +1,4 @@
-coverage==7.2.2
+coverage==7.2.3
 flake8==3.3.0; python_version < '3.8'
 flake8==3.8.4; python_version >= '3.8'
 pytest-cov==4.0.0