Get process output from Malt, instead of capturing it ourselves #181

Job	Run time
test (1, x86, windows-latest)	2m 34s
test (1, default, macOS-latest)	1m 44s
test (1, default, ubuntu-latest)	1m 27s
test (pre, default, ubuntu-latest)	1m 33s
test (nightly, default, ubuntu-latest)	1m 44s
test (min, default, macOS-latest)	21s
test (min, x86, ubuntu-latest)	25s
test (pre, default, windows-latest)	2m 14s
test (pre, x86, windows-latest)	2m 44s
test (min, default, windows-latest)	40s
test (nightly, x86, windows-latest)	2m 30s
test (nightly, default, macOS-latest)	2m 45s
test (nightly, x86, ubuntu-latest)	2m 8s
test (1, default, windows-latest)	2m 7s
test (min, x86, windows-latest)	1m 0s
test (min, default, ubuntu-latest)	24s
test (pre, x86, ubuntu-latest)	1m 52s
test (pre, default, macOS-latest)	1m 54s
test (nightly, default, windows-latest)	2m 29s
test (1, x86, ubuntu-latest)	1m 47s
	34m 22s

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