language: node_js
node_js:
  - "7"
before_script:
  - npm install -g gulp-cli
script: gulp

language: node_js
node_js:
  - "12.7.0"
  - "lts/10.16.1"
before_script:
  - npm install -g gulp-cli
script: gulp

Switch from nodeJSv7 to v10 lts and v12
Switch from nodeJSv7 to v10 lts and v12