feat(core/eventStreams): test with eventStreamMarshaller

Author: kuhe

packages/core/package.json

@@ -119,6 +119,7 @@
     "directory": "packages/core"
   },
   "devDependencies": {
+    "@smithy/eventstream-serde-node": "workspace:^",
     "@types/node": "^18.11.9",
     "concurrently": "7.0.0",
     "downlevel-dts": "0.10.1",