Linting

As a helpful development tool, you can enable automatic linting before commiting.

Run npm install.
Before development, run composer install
After you're done run composer install --no-dev to remove development dependencies

(Steps 2 and 3 will be removed once we have an automated build process. See wp-graphql#224)

Your changed files will now be linted via phpcs and your commit will fail with a list of errors if there are any.