[steal] steal vulnerable to Prototype Pollution

Prototype pollution vulnerability in function convertLater in npm-convert.js in stealjs steal 2.2.4 via the packageName variable in npm-convert.js.

References

• https://nvd.nist.gov/vuln/detail/CVE-2022-37258
• https://github.com/stealjs/steal/issues/1527
• https://github.com/stealjs/steal/blob/c9dd1eb19ed3f97aeb93cf9dcea5d68ad5d0ced9/ext/npm-convert.js#L362
• https://github.com/stealjs/steal/blob/c9dd1eb19ed3f97aeb93cf9dcea5d68ad5d0ced9/ext/npm-convert.js#L369
• https://github.com/advisories/GHSA-gvjw-8mmr-8f6g