https://github.com/capnproto/capnproto/commit/1ae1e9990c7603f0dc99e64470f96693f869b00a

From 1ae1e9990c7603f0dc99e64470f96693f869b00a Mon Sep 17 00:00:00 2001
From: Heiko Becker <mail@heiko-becker.de>
Date: Wed, 25 Jan 2023 23:40:27 +0100
Subject: [PATCH] Fix build with gcc 13 by including <stdint.h> (#1613)

Like other versions before, gcc 13 moved some includes around and as
a result <stdint.h> is no longer transitively included. Explicitly
include it for uint8_t.
--- a/src/kj/string-test.c++
+++ b/src/kj/string-test.c++
@@ -24,6 +24,7 @@
 #include <string>
 #include "vector.h"
 #include <locale.h>
+#include <stdint.h>
 
 namespace kj {
 namespace _ {  // private