message: Remove preference of offline caching
  (to check timing impact during CI/CD and check impact on failing Heroku startup)
diff: @@ -25,10 +25,10 @@ env:
  addons:
  chrome: stable
  install:
  - - if [[ -z "$TRAVIS_TAG" ]]; then npm install --prefer-offline; fi
  + - if [[ -z "$TRAVIS_TAG" ]]; then npm install; fi
  script: if [[ -z "$TRAVIS_TAG" && "$TRAVIS_OS_NAME" != "windows" && "$TRAVIS_CPU_ARCH" == "amd64" ]]; then NODE_ENV=test npm test; fi
  before_deploy:
  - - npm install --production --prefer-offline
  + - npm install --production
  - npm prune --production && cd frontend && npm prune --production && cd ..
  - npm dedupe && cd frontend && npm dedupe && cd ..
  - npm install grunt-cli
  @@ -109,7 +109,7 @@ jobs:
  install: skip
  script: skip
  before_deploy:
  - - npm install --production --prefer-offline
  + - npm install --production
  deploy:
  - provider: heroku
  strategy: api
  