Merge pull request #1030 from Automattic/merge-devtools #1034

Job	Run time
Prepare build matrix	3s
Build Docker image (ref: 6.7.1, tag: 6.7)	1m 36s
Build Docker image (ref: 6.6.2, tag: 6.6)	1m 12s
Build Docker image (ref: 6.5.5, tag: 6.5)	1m 14s
Build Docker image (ref: 6.4.5, tag: 6.4)	1m 6s
Build Docker image (ref: 6.3.5, tag: 6.3)	1m 9s
Build Docker image (ref: 6.2.6, tag: 6.2)	1m 10s
Build Docker image (ref: 6.1.7, tag: 6.1)	1m 6s
Build Docker image (ref: 6.0.9, tag: 6.0)	1m 5s
Build Docker image (ref: , tag: trunk)	1m 56s
	11m 37s

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