language: node_js
node_js:
 - "10"
 - "8"
 - "7"
 - "6"
 - "5"
 - "4"
 - "0.11"
 - "0.10"
 - "0.12"
before_install:
 - if [[ `npm -v` < 5 ]]; then npm cache clean; fi
 - if [[ `npm -v` != 3* ]]; then npm i -g npm@3; fi