title: graphqljs - Query root type must be provided
body: <p>How do I get around this error? For this particular schema, I do not need any queries (they're all mutations). I cannot pass <code>null</code> and if I pass an empty <code>GraphQLObjectType</code> it gives me the error: </p>
  
  <pre><code>Type Query must define one or more fields.
  </code></pre>