images: ['waffleimage/debian8']
travis_deb:
provisioner: docker
- images: ['debian:8', 'debian:9', 'ubuntu:14.04', 'ubuntu:16.04', 'ubuntu:18.04']
+ images: ['debian:8', 'debian:9', 'ubuntu:16.04', 'ubuntu:18.04']
waffle_deb:
provisioner: docker
images: ['waffleimage/debian8', 'waffleimage/debian9', 'waffleimage/ubuntu14.04', 'waffleimage/ubuntu16.04', 'waffleimage/ubuntu18.04']