Bump version to 0.30.0 #1312

Job	Run time
Check coding standards	31s
Run tests (Ubuntu, 3.8)	1m 56s
Run tests (Ubuntu, 3.9)	1m 55s
Run tests (Ubuntu, 3.10)	1m 55s
Run tests (Ubuntu, 3.11)	2m 0s
Run tests (Ubuntu, 3.12)	1m 50s
Run tests (MacOS, 3.8)	2m 16s
Run tests (MacOS, 3.9)	1m 58s
Run tests (MacOS, 3.10)	1m 25s
Run tests (MacOS, 3.11)	1m 25s
Run tests (MacOS, 3.12)	1m 31s
Run tests (Windows, 3.9)	3m 18s
Run tests (Windows, 3.10)	2m 54s
Run tests (Windows, 3.11)	2m 59s
Run tests (Windows, 3.12)	3m 4s
Build distribution	11s
Upload release to PyPI	0s
Upload homebrew formula	0s
Sign the Python 🐍 distribution 📦 with Sigstore and upload them to GitHub Release	0s
	31m 8s

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