isPromise workaround

Author: saihaj

src/mutation/mutation.ts

@@ -91,7 +91,7 @@ export function mutationWithClientMutationId(
       const { clientMutationId } = input;
       const payload = mutateAndGetPayload(input, context, info);
       if (isPromise(payload)) {
-        // @ts-expect-error FIXME
+        // @ts-expect-error update to 16.x.x should fix this
         return payload.then(injectClientMutationId);
       }
       return injectClientMutationId(payload);

src/mutation/type.d.ts

@@ -1,2 +1,3 @@
+// Remove after update to 16.x.x
 // eslint-disable-next-line import/unambiguous
 declare module 'graphql/jsutils/isPromise';