chore(deps): update dependency flake8 to v6

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
flake8 (changelog)	`^5.0.0` -> `^6.0.0`

Release Notes

pycqa/flake8

### [`v6.0.0`](https://togithub.com/pycqa/flake8/compare/5.0.4...6.0.0) [Compare Source](https://togithub.com/pycqa/flake8/compare/5.0.4...6.0.0)

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

[ ] If you want to rebase/retry this PR, check this box

This PR has been generated by Mend Renovate. View repository job log here.

⚠ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

any of the package files in this branch needs updating, or
the branch becomes conflicted, or
you click the rebase/retry checkbox if found above, or
you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: poetry.lock

installing v2 tool python v3.11.3
linking tool python v3.11.3
Python 3.11.3
pip 23.1.2 from /opt/buildpack/tools/python/3.11.3/lib/python3.11/site-packages/pip (python 3.11)
Installed v2 /usr/local/buildpack/tools/v2/python.sh in 9 seconds
installing v2 tool poetry v1.4.2
linking tool poetry v1.4.2
Poetry (version 1.4.2)
Installed v2 /usr/local/buildpack/tools/v2/poetry.sh in 13 seconds
Updating dependencies
Resolving dependencies...

Creating virtualenv earhorn-8scra8xs-py3.11 in /home/ubuntu/.cache/pypoetry/virtualenvs

The current project's Python requirement (>=3.8,<4.0) is not compatible with some of the required packages Python requirement:
  - flake8 requires Python >=3.8.1, so it will not be satisfied for Python >=3.8,<3.8.1

Because no versions of flake8 match >6.0.0,<7.0.0
 and flake8 (6.0.0) requires Python >=3.8.1, flake8 is forbidden.
So, because earhorn depends on flake8 (^6.0.0), version solving failed.

  • Check your dependencies Python requirement: The Python requirement can be specified via the `python` or `markers` properties

    For flake8, a possible solution would be to set the `python` property to ">=3.8.1,<4.0"

    https://python-poetry.org/docs/dependency-specification/#python-restricted-dependencies,
    https://python-poetry.org/docs/dependency-specification/#using-environment-markers

jooola / earhorn