before_install: npm install npm -g
language: node_js
node_js:
  - "6"
  - "4"
  - "0.12"
  - "0.10"

before_install: npm install npm -g
language: node_js
node_js:
  - "6"
  - "4"

Remove nodejs lower version for const syntax warning
Remove nodejs lower version for const syntax warning
