message: correction doc
diff: @@ -73,7 +73,7 @@ be conveniently converted to a promise.
  ```js
  import { pipe, subscribe } from 'wonka';
  -const { subscribe } = pipe(
  +const { unsubscribe } = pipe(
  client.query('{ test }', {
  /* vars */
  }),
  @@ -87,6 +87,7 @@ client
  .query('{ test }', {
  /* vars */
  })
  + .toPromise()
  .then(result => {
  console.log(result); // OperationResult
  });
  