Bump flake8 from 4.0.1 to 5.0.4

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
...

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

Author: dependabot[bot]

poetry.lock

@@ -66,7 +66,7 @@ solvents = ["thermo"]
 [tool.poetry.dev-dependencies]
 bandit = "^1"
 black = {version = "^22", allow-prereleases = true}
-flake8 = "^4"
+flake8 = "^5"
 isort = "^5"
 mypy = "^0.971"
 pydocstyle = "^6"