[Feature Request] Python 3.12 support

[befelix]

Motivation

Python 3.12 has been release about 1 year ago, but there are only wheels for Python 3.7 - 3.11 on PyPI. This makes it difficult to use envpool with newer versions of Python.

Solution

Release a new version of envpool that includes wheels for Python 3.12

Alternatives

Explicitly state that Python 3.7 - 3.11 is supported in the Readme.

Checklist

• I have checked that there is no similar issue in the repo (required)