Bump version to 0.31.1 #1349

Job	Run time
Check coding standards	30s
Run tests (Ubuntu, 3.9)	1m 57s
Run tests (Ubuntu, 3.10)	2m 13s
Run tests (Ubuntu, 3.11)	2m 0s
Run tests (Ubuntu, 3.12)	1m 59s
Run tests (Ubuntu, 3.13)	2m 1s
Run tests (MacOS, 3.9)	1m 36s
Run tests (MacOS, 3.10)	1m 49s
Run tests (MacOS, 3.11)	1m 57s
Run tests (MacOS, 3.12)	2m 3s
Run tests (MacOS, 3.13)	1m 27s
Run tests (Windows, 3.9)	3m 24s
Run tests (Windows, 3.10)	2m 58s
Run tests (Windows, 3.11)	3m 1s
Run tests (Windows, 3.12)	3m 20s
Run tests (Windows, 3.13)	4m 3s
Build distribution	12s
Upload release to PyPI	0s
Sign the Python 🐍 distribution 📦 with Sigstore and upload them to GitHub Release	0s
Upload homebrew formula	0s
	36m 30s

Provide feedback