fix(graphql): fix SocketClient to close subscription on socket close

Fixes #1183

Author: qbx2

packages/graphql/lib/src/links/websocket_link/websocket_client.dart

@@ -495,7 +495,19 @@ class SocketClient {
                 .where((message) => message is SubscriptionComplete)
                 .take(1);
 
-        subscriptionComplete.listen((_) => response.close());
+        subscriptionComplete.listen(
+          (_) => response.close(),
+          onDone: () {
+            if (!config.autoReconnect) {
+              response.close();
+            }
+          },
+          onError: (_) {
+            if (!config.autoReconnect) {
+              response.close();
+            }
+          },
+        );
 
         dataErrorComplete
             .where((message) => message is SubscriptionData)