eslint config rules for Particle Javascript projects

1. Install dependencies npm install --save-dev eslint eslint-config-particle
2. Tell eslint to use the Particle config by creating .eslintrc.js

module.exports = {
  extends: ['eslint-config-particle'],
  root: true
}

1. Add lint scripts to package.json

  "scripts": {
    "lint": "eslint . --quiet -f unix",
    "lint:fix": "eslint . --quiet --fix -f unix",
  }

1. Run lint as part of the CI pipeline, for example by adding to .travis.yml

script:
- npm run lint && npm test