build

Bump version: 3.9.29 → 3.9.30-alpha.0 #1822

Job	Run time
py39 (ubuntu)	10m 12s
check	1m 4s
py310 (ubuntu)	10m 27s
py311 (ubuntu)	9m 56s
py39 (windows)	11m 58s
py311 (macos)	6m 31s
docs	1m 7s
py311 (windows)	12m 57s
py310 (windows)	12m 10s
py38 (ubuntu)	10m 11s
Deploy docs to GitHub Pages	1m 5s
Upload coverage to Coveralls	10m 7s
	1h 37m 45s

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