.tavis.ci: use newer osx image to fix builds

28 jobs for <span class="ref-name">fix-travis-ci</span> in 5 minutes and 49 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
passed #274200
docker linux amd64
archive

00:00:55

passed #274201
docker linux amd64
build

00:01:03

passed #274202
docker linux amd64
build-asan

00:01:03

passed #274203
docker
kres-gen

00:01:00

 
  Test
passed #274204
docker delayed
build:darwin

00:00:54

passed #274227
docker linux amd64
deckard

00:01:51

passed #274206
docker delayed
doc

00:01:10

passed #274207
dind
docker

00:02:08

passed #274208
docker delayed
lint:other

00:00:52

passed #274209
docker linux amd64 delayed
lint:pedantic

00:01:12

passed #274210
docker linux amd64
lint:scan-build

00:02:25

passed #274211
docker linux amd64
lint:tidy

00:03:03

passed #274212
privileged
pkg:epel-7

00:01:55

passed #274213
privileged
pkg:fedora-29

00:02:36

passed #274214
docker linux amd64
respdiff:basic

00:04:45

passed #274215
docker linux amd64 delayed
test:valgrind

00:02:13

failed #274205
docker linux amd64
deckard

00:02:33

 
  Extended
canceled #274217
respdiff
fwd-tls6-kresd.udp6

canceled #274218
respdiff
fwd-udp6-kresd.udp6

canceled #274222
respdiff
fwd-udp6-unbound.tcp6

canceled #274223
respdiff
fwd-udp6-unbound.tls6

canceled #274221
respdiff
fwd-udp6-unbound.udp6

canceled #274220
respdiff
iter.tls6

canceled #274219
respdiff
iter.udp6

canceled #274216
docker linux amd64
pytests

canceled #274224
respdiff
resperf:fwd-tls6.udp-asan

canceled #274225
respdiff
resperf:fwd-udp6.udp-asan

canceled #274226
respdiff
resperf:iter.udp-asan