Airbnb eslint issue: comma-dangle

.eslintrc.js

module.exports = {
    "extends": "airbnb-base"
};

README.md

Run:

$ npm install
$ eslint index.js

I expected no errors.

I see there is an error about comma-dangle. However, adding a comma results in a SyntaxError.

index.js

process.stdout.write(
  'Hello, World!\n',
  'utf-8'
);

package.json

{
  "devDependencies": {
    "eslint": "^4.10.0",
    "eslint-config-airbnb-base": "^12.1.0",
    "eslint-plugin-import": "^2.8.0"
  }
}