{
  "extends": "eslint:recommended",
  "parserOptions": { 
    "ecmaVersion": 2017, 
    "sourceType": "module" 
  },
  "env": { 
    "es6": true, 
    "node": true, 
    "mocha": true 
  },
  "rules": {
    "no-var":"error",
    "prefer-const":"error"
  }
}