`npm run lint` failing on osx

I'm following along with the `Building a JavaScript Development Environment` Pluralsight course, Linting chapter - Demo video. I just modified package.json and added .eslintrc.json

Running `npm run lint` produces an error, and creates the attached npm-debug.log file.

There are no spaces in any directories in my projects path. Can you advise?

[npm-debug.txt](https://github.com/coryhouse/javascript-development-environment/files/784736/npm-debug.txt)

Start with package.json and .eslintrc.json, then run npm run lint on macOS and inspect the attached npm-debug.log for the reported failure. Done means the lint command completes successfully with the documented project configuration.

索引モデルが issue の本文から書いたものです。