From 5bfb31384a422c922a7ec471839d2776b1092880 Mon Sep 17 00:00:00 2001
From: Saihajpreet Singh <saihajpreet.singh@gmail.com>
Date: Tue, 23 Mar 2021 22:37:20 -0500
Subject: [PATCH 1/2] feat: return AsyncGenerator

---
 src/subscription/mapAsyncIterator.d.ts | 4 ++--
 src/subscription/subscribe.d.ts        | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/subscription/mapAsyncIterator.d.ts b/src/subscription/mapAsyncIterator.d.ts
index ecf2e51cd3..fb031ba3bf 100644
--- a/src/subscription/mapAsyncIterator.d.ts
+++ b/src/subscription/mapAsyncIterator.d.ts
@@ -5,7 +5,7 @@ import { PromiseOrValue } from '../jsutils/PromiseOrValue';
  * which produces values mapped via calling the callback function.
  */
 export function mapAsyncIterator<T, U>(
-  iterable: AsyncIterable<T>,
+  iterable: AsyncIterable<T> | AsyncGenerator<T, void, void>,
   callback: (arg: T) => PromiseOrValue<U>,
   rejectCallback?: (arg: any) => PromiseOrValue<U>,
-): any; // TS_SPECIFIC: AsyncGenerator requires typescript@3.6
+): AsyncGenerator<U, void, void>;
diff --git a/src/subscription/subscribe.d.ts b/src/subscription/subscribe.d.ts
index 2dcfeed21e..46c00d3e92 100644
--- a/src/subscription/subscribe.d.ts
+++ b/src/subscription/subscribe.d.ts
@@ -39,7 +39,7 @@ export interface SubscriptionArgs {
  */
 export function subscribe(
   args: SubscriptionArgs,
-): Promise<AsyncIterableIterator<ExecutionResult> | ExecutionResult>;
+): Promise<AsyncGenerator<ExecutionResult, void, void> | ExecutionResult>;
 
 /**
  * Implements the "CreateSourceEventStream" algorithm described in the

From 79554f756b46078beeb56178f137dae3c86860a9 Mon Sep 17 00:00:00 2001
From: Saihajpreet Singh <saihajpreet.singh@gmail.com>
Date: Tue, 23 Mar 2021 22:54:26 -0500
Subject: [PATCH 2/2] build: sync integration test tsconfig with main tsconfig

---
 integrationTests/ts/tsconfig.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/integrationTests/ts/tsconfig.json b/integrationTests/ts/tsconfig.json
index ea6266120c..03106e8e86 100644
--- a/integrationTests/ts/tsconfig.json
+++ b/integrationTests/ts/tsconfig.json
@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
     "module": "commonjs",
-    "lib": ["es6", "esnext.asynciterable"],
+    "lib": ["es2019", "es2020.string"],
     "strict": true,
     "noEmit": true,
     "types": []