Update cask from 0.6.0 to 0.6.7 (#1399) #768

Job	Run time
publishLocal (2.12.19)	1m 24s
publishLocal (2.13.13)	1m 28s
publishLocal (3.3.3)	1m 32s
test (8, 2.12)	48m 21s
itest (8, 2.12)	32m 23s
test (8, 2.13)	44m 20s
itest (8, 2.13)	33m 55s
test (8, 3)	27m 30s
itest (8, 3)	16m 26s
test (11, 2.12)	49m 49s
itest (11, 2.12)	50m 21s
test (11, 2.13)	47m 57s
itest (11, 2.13)	56m 32s
itest (11, 3)	25m 38s
test (11, 3)	27m 45s
itest (17, 2.12)	47m 29s
test (17, 2.12)	43m 24s
itest (17, 2.13)	53m 53s
test (17, 2.13)	43m 45s
itest (17, 3)	25m 21s
test (17, 3)	27m 48s
publishDosc / publishDocs	2m 33s
publishExecutable / publishExecutable	3m 14s
release / release (1)	17m 39s
release / release (2)	18m 8s
release / release (3)	17m 40s
release / release (4)	17m 11s
release / release (5)	9m 57s
	13h 13m 23s

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