Add a callback for receiving stderr output (#525) #464

Job	Run time
build (ubuntu-latest, Release)	2m 45s
build (macos-latest, Release)	1m 58s
build (ubuntu-latest, Debug)	2m 47s
build (windows-latest, Debug)	4m 55s
build (windows-latest, Release)	7m 15s
build (macos-latest, Debug)	1m 48s
publish-coverage / publish-coverage	38s
	22m 6s

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