|                    |  | environment:
  matrix:
    - nodejs_version: "4"
    - nodejs_version: "5"
    - nodejs_version: "6"
    - nodejs_version: "8"
    - nodejs_version: "10"
    - nodejs_version: "" # latest
install:
  - ps: "Install-Product node $env:nodejs_version"
  - "npm install"
test_script:
  - "node --version"
  - "npm --version"
  - "npm test"
build: off
 |