PyHOCON to support python3.11

[Elmiira]

Hi there,
I recently encountered the Python 3.11 compatibility, and I was wondering if you could provide an estimate for the required adjustments.

Additionally, given that Python 3.11 is scheduled for release in October 2022, and its support extends until October 2024, I'm curious about your plans for PyHOCON in this context. Could you share any insights into when you anticipate the next release that includes Python 3.11 support?

[pierresouchay]

@Elmiira working fine for me with python 3.11 and 3.12

Those versions are even tested now: #330