Use released Ruby 2.6

5 jobs for master in 6 minutes and 3 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #138877623
test:2.3

00:02:52

89.51%
passed #138877624
test:2.4

00:03:05

89.51%
passed #138877625
test:2.5

00:02:53

89.51%
passed #139794445
test:2.6

00:02:57

89.48%
failed #138877626
test:2.6

00:00:06