language: node_js
node_js:
  - "8.14.0"
  - "10.14.1"
  - "11.4.0"
sudo: false
addons:
  firefox: "63.0.3"
  apt:
    sources:
      - ubuntu-toolchain-r-test
    packages:
      - build-essential
env:
  - CXX=g++
notifications:
  email:
    on_success: never