language: node_js
node_js:
  - "6"
  - "6.0.0"
  - "6.1.0"
  - "6.2.0"
  - "6.2.1"
  - "6.2.2"
  - "6.3.0"
  - "6.3.1"
  - "6.4.0"
  - "6.5.0"
  - "6.6.0"
  - "6.7.0"
script:
  - npm run test:coveralls

language: node_js
node_js:
  - "6"
  - "6.0.0"
  - "6.1.0"
  - "6.2.x"
  - "6.3.x"
  - "6.4.0"
  - "6.5.0"
  - "6.6.0"
  - "6.7.0"
script:
  - npm run test:coveralls

Use only latest of certain Node.js releases for build.
Use only latest of certain Node.js releases for build.
