language: node_js
node_js:
- '6'
- '5.9'
- '4.4'
cache: yarn
before_install:
- npm install -g grunt-cli
notifications:
  email: false
  slack:
    secure: Q2NlerQC8kgzjkD3gnMFs4VPJ35UMZ8tG6tj/PAHCK4U0iPBJ2Um6WxEa9JvvFe2eXiAIZhq2ZWhfU2cPh/fOYIQYNxGeXFJ8SfnXIJiCzEWCzFtNvRQt1scjukXNPxnvvvT/xP/hfmc9/7EnwlgAQoEQ+1SlMjKIc71g3qzvSw=