Export graphQLQuery function from fb/user.js

Summary: ... so device plugins can import it via the flipper module.

Reviewed By: danielbuechele

Differential Revision: D16111730

fbshipit-source-id: ac399692a11fc2b61d702eb46c57f6ca30fe0d72

src/index.js

@@ -10,6 +10,7 @@ export * from './ui/index.js';
 export * from './utils/index.js';
 export {default as GK} from './fb-stubs/GK.js';
 export {default as createPaste} from './fb-stubs/createPaste.js';
+export {graphQLQuery} from './fb-stubs/user.js';
 export {
   FlipperBasePlugin,
   FlipperPlugin,