build

Bump version: 3.6.6 → 3.6.7 #972

Job	Run time
check	49s
docs	1m 3s
py38 (ubuntu)	4m 59s
py39 (ubuntu)	4m 45s
py39 (windows)	6m 47s
py310 (ubuntu)	4m 58s
py310 (windows)	6m 25s
py311 (ubuntu)	4m 51s
py311 (macos)	4m 9s
py311 (windows)	7m 22s
Upload coverage to Coveralls	4m 53s
Deploy docs to GitHub Pages	1m 4s
	52m 5s

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