quic: serialize stream reset code as string

Signed-off-by: manNomi <hanmw110@naver.com>

Author: manNomi

lib/internal/quic/state.js

@@ -926,7 +926,7 @@ class QuicStreamState {
       wantsHeaders,
       wantsTrailers,
       early,
-      resetCode,
+      resetCode: `${resetCode}`,
       writeDesiredSize,
       highWaterMark,
     };

test/parallel/test-quic-internal-endpoint-stats-state.mjs

@@ -179,6 +179,7 @@ strictEqual(sessionState.maxDatagramSize, 0);
 strictEqual(sessionState.lastDatagramId, 0n);
 
 strictEqual(typeof streamState.toJSON(), 'object');
+strictEqual(JSON.parse(streamState.toString()).resetCode, '0');
 strictEqual(typeof sessionState.toJSON(), 'object');
 strictEqual(typeof inspect(streamState), 'string');
 strictEqual(typeof inspect(sessionState), 'string');