language: node_js
node_js:
  - "node"
  - "iojs"
  - "0.12"
  - "0.10"

language: node_js
node_js:
  - "node"
  - "6"
  - "4"

Update Travis CI config: Drop v0.10, v0.12 & iojs, add v4 & v6
Update Travis CI config: Drop v0.10, v0.12 & iojs, add v4 & v6
