Bump coverage from 6.3.3 to 6.4

Bumps [coverage](https://github.com/nedbat/coveragepy) from 6.3.3 to 6.4.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@6.3.3...6.4)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

poetry.lock

@@ -45,7 +45,7 @@ black = "^22.3"
 isort = "^5.9.3"
 flake8 = "^4.0.1"
 bandit = "^1.7.4"
-coverage = "^6.3"
+coverage = "^6.4"
 pytest-cov = "^3.0.0"
 pytest-xdist = "^2.5.0"
 unasync = "^0.5.0"