Support for Python 3.11 / 3.12

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**Is your feature request related to a problem? Please describe.**
There is mentioned support for Python as of 3.5 on pypi. In the `nox` tests, I've found support for Python 3.10. Considering that 3.11 and 3.12 have been available for some time and are available for most PaaS services in Google Cloud, I was wondering what the next steps are for Python 3.12 support.

**Describe the solution you'd like**
Provide support for Python 3.11, 3.12.

**Describe alternatives you've considered**
Running the library in 3.12 without waiting for official support.

**Additional context**