message: Switch Heroku deployment to Node.js 11.x
  (Heroku always uses the latest version from supported range no
  matter what it specified. This just makes it look consistent on
  the Travis-CI dashboards.)
diff: @@ -58,6 +58,7 @@ jobs:
  script: NODE_ENV=ctf npm run protractor
  - stage: deploy
  if: (branch = master OR branch = develop) AND NOT type = pull_request
  + node_js: 11
  install: skip
  script: skip
  deploy:
  