language: node_js
matrix:
  include:
  - node_js: "10"
    env: NPM_VERSION=""
  - node_js: "9"
    env: NPM_VERSION=""
  - node_js: "8"
    env: NPM_VERSION=""
  - node_js: "7"
    env: NPM_VERSION=""
  - node_js: "6"
    env: NPM_VERSION=""
  - node_js: "5"
    env: NPM_VERSION="@5"
  - node_js: "4"
    env: NPM_VERSION="@5"

# Allow Travis tests to run in containers.
sudo: false

# Update package-lock.json after test runs:
before_install:
  - npm install -g npm$NPM_VERSION
  - npm install -g greenkeeper-lockfile@1
before_script: greenkeeper-lockfile-update
after_script: greenkeeper-lockfile-upload