change ci image version (#4313)
authorTianqi Chen <tqchen@users.noreply.github.com>
Thu, 14 Nov 2019 17:15:45 +0000 (09:15 -0800)
committerGitHub <noreply@github.com>
Thu, 14 Nov 2019 17:15:45 +0000 (09:15 -0800)
commitb127dc76e7f64fd104708a25857ccfa8e58d80de
tree7157b0ba9991a6f4dbd12c03cc53fdcbc13eb998
parent72d8a886c974858f3df4533f4cdda1332642bf64
change ci image version (#4313)
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