fix: catch errors when destroying invalid upgrades (#658)

Before this change, receiving an HTTP2 upgrade would make the server
crash:

> Error: read ECONNRESET
>    at TCP.onStreamRead (node:internal/stream_base_commons:217:20) {
>  errno: -104,
>  code: 'ECONNRESET',
>  syscall: 'read'
> }

This can be reproduced with Node.js v14.15.3, v16.18.1 and v18.12.1.

lib/server.ts

@@ -678,6 +678,9 @@ export class Server extends BaseServer {
           setTimeout(function() {
             // @ts-ignore
             if (socket.writable && socket.bytesWritten <= 0) {
+              socket.on("error", e => {
+                debug("error while destroying upgrade: %s", e.message);
+              });
               return socket.end();
             }
           }, destroyUpgradeTimeout);