Fork and clone this repo.
* Run the command `npm i` to install needed node packages.
* Run the command `npm test` to run the tests.
* Work through the files and make the tests pass.
* Suggested order: `es6.js`, `arrays.js`, `objects.js`, `this.js`, `class.js`, `closure.js`, and then `recursion.js`.
* Submit a pull request when you are finished and we will review your code.