build

Bump version: 3.9.15 → 3.9.16 #1651

Job	Run time
docs	59s
py39 (windows)	10m 58s
check	44s
py310 (windows)	12m 49s
py311 (macos)	8m 11s
py310 (ubuntu)	10m 15s
py38 (ubuntu)	9m 30s
py311 (ubuntu)	9m 29s
py39 (ubuntu)	9m 26s
py311 (windows)	12m 27s
Upload coverage to Coveralls	9m 31s
Deploy docs to GitHub Pages	1m 10s
	1h 35m 29s

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