Working code:

Change package.json to:

{
  "dependencies": {
    "graphql": "14.4.2"
  }
}

And run node index.js

Broken code (BC break in minor release):

Change package.json to:

{
  "dependencies": {
    "graphql": "14.5.0"
    // "graphql": "^14.5.0"
  }
}

And run node index.js. Is throws this error:

GraphQLError: Variable "$name" of required type "String!" was not provided.