Error on newer node versions

[tmm1]

Description

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What type of issue is this? (place an x in one of the [ ])

• bug
• enhancement (feature request)
• question
• documentation related
• testing related
• discussion

Requirements (place an x in each of the [ ])

• I've read and understood the Contributing guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.
• I've searched for any related issues and avoided creating a duplicate issue.

---

Bug Report

(node:2417258) ExperimentalWarning: Import assertions are not a stable feature of the JavaScript language. Avoid relying on their current behavior and syntax as those might change in a future version of Node.js.

import pkg from '../package.json' assert { type: 'json' }
                                  ^^^^^^

SyntaxError: Unexpected identifier 'assert'

Reproducible in:

hubot-slack version:

node version: 20.x or 22.x