properly export getOperationAST utility

Author: leebyron

src/utilities/index.js

@@ -11,6 +11,9 @@
 // The GraphQL query recommended for a full schema introspection.
 export { introspectionQuery } from './introspectionQuery';
 
+// Gets the target Operation from a Document
+export { getOperationAST } from './getOperationAST';
+
 // Build a GraphQLSchema from an introspection result.
 export { buildClientSchema } from './buildClientSchema';