build(deps-dev): bump flake8 from 4.0.1 to 5.0.4 (#179)

Bumps [flake8](https://github.com/pycqa/flake8) from 4.0.1 to 5.0.4.
- [Release notes](https://github.com/pycqa/flake8/releases)
- [Commits](PyCQA/flake8@4.0.1...5.0.4)

---
updated-dependencies:
- dependency-name: flake8
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

pyproject.toml

@@ -19,7 +19,7 @@ prometheus-client = ">= 0.8.0, < 1.0.0"
 
 [tool.poetry.dev-dependencies]
 black = "^22.3.0"
-flake8 = "^4.0.0"
+flake8 = "^5.0.4"
 requests = "^2.27.1"
 pytest = "^7.1.2"
 pytest-cov = "^3.0.0"