Add python 3.11 to ray's version matrix

[nzw0301]

Motivation

Resolve a sub-task of #164.

Description of the changes

As is the PR title.

[toshihikoyanase]

Thank you for your PR. The CI passed, but the pypi of ray does not list Python 3.11.
Do you check the example on Python 3.11?

[nzw0301]

No, I didn't check it. In fact, the latest stable ray supports Python 3.11 experimentally, so I'm not sure the example works without any errors...

[nzw0301]

I might take time to prepare for creating a python 3.11 environment for the local test, but I'll take a look at it.

[nzw0301]

Unfortunately, ray doesn't support macOS with python 3.11 yet, so I cannot test the example soon...

Ref: https://docs.ray.io/en/latest/ray-overview/installation.html

[toshihikoyanase]

Thank you for your confirmation. I'll try it on WSL2.

[github-actions]

This pull request has not seen any recent activity.

[toshihikoyanase]

Sorry for the delayed response. Let me check this PR today.

[toshihikoyanase]

I confirmed that joblib/ray_joblib.py worked with Python 3.11 on a Linux machine.
LGTM!

$ cd ray
$ pip install oputna scikit-learn ray
$ python ray_joblib.py
...
Number of finished trials: 100
Elapsed time: 0:05:28.487118
Best trial:
  Value: 0.9866666666666667
  Params:
    classifier: SVC
    svc_c: 4.216210865309544

During the review, I'm wondering the following things:

• Why the CI workflow does not execute the example. It easily worked like the other examples in my environment.
• Why requirements.txt lacks in this directory

Maybe we can work on them in follow-up PRs.