Add py312 to CI pipeline #321

Job	Run time
Test pre-commit console encoding	45s
Test Python 3.8 (ubuntu-latest)	1m 4s
Test Python 3.9 (ubuntu-latest)	1m 7s
Test Python 3.10 (ubuntu-latest)	59s
Test Python 3.11 (ubuntu-latest)	1m 2s
Test Python 3.12 (ubuntu-latest)	19s
Test Python 3.8 (windows-latest)	2m 44s
Test Python 3.9 (windows-latest)	2m 43s
Test Python 3.10 (windows-latest)	2m 35s
Test Python 3.11 (windows-latest)	2m 57s
Test Python 3.12 (windows-latest)	1m 3s
Test Python 3.8 (macOS-latest)	2m 13s
Test Python 3.9 (macOS-latest)	2m 14s
Test Python 3.10 (macOS-latest)	1m 51s
Test Python 3.11 (macOS-latest)	3m 14s
Test Python 3.12 (macOS-latest)	41s
	27m 31s

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