.eslintrc.json

{
  "env": {
    "es6": true,
    "node": true,
    "mocha": true
  },
  "extends": "eslint:recommended",
  "parserOptions": {
    "ecmaVersion": 8
  },
  "rules": {
    "no-unused-vars": [
      "warn", {
        "vars": "all",
        "args": "after-used",
        "ignoreRestSiblings": false
      }
    ],
    "prefer-destructuring": ["warn", {
      "array": true,
      "object": true
    }, {
      "enforceForRenamedProperties": false
    }],
    "no-await-in-loop": [ "warn" ],
    "indent": [
      "off",
      2
    ],
    "linebreak-style": [
      "error",
      "unix"
    ],
    "quotes": [
      "error",
      "single"
    ],
    "semi": [
      "error",
      "always"
    ],
    "prefer-template": [
      "error"
    ],
    "prefer-arrow-callback": [
      "error"
    ],
    "prefer-const": [ "error" ],
    "no-var": [ "error" ],
    "space-before-function-paren": ["error", "never"]
  }
}