add workflow to emulate post-merge event after hook-dependencies-update #1120

Job	Run time
macOS-latest (release, brew)	5m 47s
macOS-latest (release, conda)	17m 9s
macOS-latest (release, pip)	6m 22s
windows-latest (release, pip)	8m 4s
windows-latest (release, conda)	24m 15s
windows-latest (devel, conda)	23m 4s
ubuntu-latest (release, pip)	4m 50s
ubuntu-latest (release, conda)	16m 33s
	1h 46m 4s

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