.travis.yml: Disable node 12 b/c of gulp incompatibility
.travis.yml: Disable node 12 b/c of gulp incompatibility

Change-type: patch
Signed-off-by: Thodoris Greasidis <5791bdc4541e79bd43d586e3c3eff1e39c16665f@balena.io>

resin-io/resin-device-status