server: close all connections

without this the server still holds on to active connections in node 18

src/server.js

@@ -483,6 +483,7 @@ async function stop() {
     if (!gHttpServer) return;
 
     await platform.uninitialize();
+    gHttpServer.closeAllConnections();
     await util.promisify(gHttpServer.close.bind(gHttpServer))();
 
     gHttpServer = null;