Add Python 3.12 to the test matrix (#678) #131

Job	Run time
Build / Build and test (ubuntu-latest, 3.8)	1m 44s
Build / Build and test (ubuntu-latest, 3.9)	1m 36s
Build / Build and test (ubuntu-latest, 3.10)	1m 44s
Build / Build and test (ubuntu-latest, 3.11)	1m 37s
Build / Build and test (ubuntu-latest, 3.12)	2m 17s
Build / Build and test (windows-latest, 3.8)	2m 43s
Build / Build and test (macos-latest, 3.8)	2m 17s
Build / Report coverage to coveralls.io	6s
Check version and tag match	1s
Generate SHA256 hashes	2s
Generate Sigstore signatures	29s
Generate SLSA provenance / detect-env	3s
Generate SLSA provenance / generator	16s
Generate SLSA provenance / upload-assets	0s
Generate SLSA provenance / final	1s
Create release assets	7s
Publish to GitHub Release	0s
Publish to PyPI	0s
	15m 3s

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