Bump version number for Python 3.12 support

Merge pull request #47 from andrasmaroy/python-3.11

Python 3.11

Fix version number in setup.py

Merge pull request #33 from andrasmaroy/pyup-scheduled-update-2021-05-02

Scheduled weekly dependency update for week 18

Merge pull request #32 from ronsinai/master

Fix order of hierarchies, fixes #31

Update pyyaml to 5.3.1, resolving CVE-2020-1747

Merge branch 'feature/docker-secrets' of github.com:andrasmaroy/pconf

Replace deprecated readfp function from ConfigParser

Merge pull request #17 from andrasmaroy/pyup-scheduled-update-2019-05-12

Scheduled weekly dependency update for week 19

Implement clear function to reset internal hierarchy