title: Special characters in GraphQL schema
body: <p>Is there any way of enabling special characters in GraphQL schema (e.g., <code>/</code>, <code>:</code>, <code>@</code> in the field names)? </p>
  
  <p>And if there isn't (which I suspect is the case) do you have an idea what would be relatively easiest way to modify the node.js code (<a href="https://github.com/graphql/graphql-js" rel="noreferrer">https://github.com/graphql/graphql-js</a>) to achieve such functionality? </p>