message: travis node version update
diff: language: node_js
  node_js:
  -- '7'
  -- '6'
  +- '9'
  +- '8'
  deploy:
  provider: heroku
  @@ -10,7 +10,7 @@ deploy:
  app: pigallery2
  on:
  repo: bpatrik/pigallery2
  - node: '7'
  + node: '8'
  cache:
  directories:
  - node_modules
  