export GraphQLDeferDirective, add to harness

Author: lilianammmatos

src/index.js

@@ -55,6 +55,7 @@ export {
   specifiedDirectives,
   GraphQLIncludeDirective,
   GraphQLSkipDirective,
+  GraphQLDeferDirective,
   GraphQLDeprecatedDirective,
   // "Enum" of Type Kinds
   TypeKind,

src/type/index.js

@@ -78,6 +78,7 @@ export {
   specifiedDirectives,
   GraphQLIncludeDirective,
   GraphQLSkipDirective,
+  GraphQLDeferDirective,
   GraphQLDeprecatedDirective,
   // Constant Deprecation Reason
   DEFAULT_DEPRECATION_REASON,

src/validation/__tests__/harness.js

@@ -11,6 +11,7 @@ import {
   GraphQLDirective,
   GraphQLIncludeDirective,
   GraphQLSkipDirective,
+  GraphQLDeferDirective,
 } from '../../type/directives';
 import {
   GraphQLInt,
@@ -362,6 +363,7 @@ export const testSchema = new GraphQLSchema({
   directives: [
     GraphQLIncludeDirective,
     GraphQLSkipDirective,
+    GraphQLDeferDirective,
     new GraphQLDirective({
       name: 'onQuery',
       locations: ['QUERY'],