Newer ECMAScript is not supported by Launch

[yuhui]

In my Web Vitals extension, I bundle the JS library for ease of implementation by users. However, when I bundle the latest Web Vitals JS library v5.1.0 (available at https://unpkg.com/web-vitals@5/dist/web-vitals.attribution.iife.js), then I get the below error when uploading my extension:

Error: Extension package processing failed. 
id:     c8eae0ef-90df-4d4f-8f55-8b2d4b1b39e7
code:   unsupported-ecma-version
meta: 
  request_id: ZQ15UWG9mSFmOTldGkDP7Fl4acFSLLX9
title:  Unsupported ECMA Version
detail: Code using an unsupported ECMAScript version was detected
source: 
    at requestStatus (/path/to/extension/node_modules/@adobe/reactor-uploader/bin/monitorStatus.js:62:11)
    at process.processTicksAndRejections (node:internal/process/task_queues:103:5)
    at async /path/to/extension/node_modules/@adobe/reactor-uploader/bin/index.js:105:5

Node.js v24.13.0

I don't get this error when I bundle the Web Vitals JS library v4.2.4.

This issue is not critical to my extension's operations, but would be good if Launch could support newer versions of ECMAScript.