message: Do not specify sudo in .travis
  Travis is deprecating the `sudo` keyword and moves everything to
  the same infrastructure (sudo really selects between two infrastructures).
  See for more info.
diff: -sudo: required
  dist: trusty
  os: linux
  language: minimal
  @@ -42,7 +41,6 @@ jobs:
  # lint stage
  - stage: lint
  env:
  - sudo: false
  cache: false
  language: python
  python: '3.6'
  