build

Bump version: 3.9.27 → 3.9.28-rc.0 #1783

Job	Run time
check	38s
py38 (ubuntu)	10m 8s
py39 (ubuntu)	10m 23s
py310 (ubuntu)	10m 22s
py311 (windows)	10m 18s
py310 (windows)	10m 14s
py311 (macos)	8m 29s
py311 (ubuntu)	10m 13s
docs	1m 0s
py39 (windows)	10m 15s
Deploy docs to GitHub Pages	0s
Upload coverage to Coveralls	-1s
	1h 21m 59s

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