refactor(eio): clear upgrade timeout upon WebTransport handhshake failure

Author: darrachequesne

packages/engine.io/lib/server.ts

@@ -548,6 +548,7 @@ export abstract class BaseServer extends EventEmitter {
     const result = await streamReader.read();
 
     if (result.done) {
+      clearTimeout(timeout);
       debug("session is closed");
       return;
     }
@@ -561,13 +562,13 @@ export abstract class BaseServer extends EventEmitter {
 
     // reading the first packet of the stream
     const { value, done } = await reader.read();
+    clearTimeout(timeout);
+
     if (done) {
       debug("stream is closed");
       return;
     }
 
-    clearTimeout(timeout);
-
     if (value.type !== "open") {
       debug("invalid WebTransport handshake");
       return session.close();