getArtifact function using deprecated (due to security and usability issues) buffer function about toolkit

[TWiStErRob]

To finish the amazing investigation, and give actionable steps for this project:

toolkit/packages/artifact/package.json

Line 52 in 5430c5d

"archiver": "^5.3.1",

The above line needs to be updated from 5.3.1 to at least 6.0.0, which doesn't look like a big jump, as the only breaking change listed is dropping Node 10. 6.0.0 uses archiver-utils 3.0.0.

• (#1633 would eventually solve this, but there's no reason to wait for that.)

[twalshOG]

This bug was addressed in #1712

[hubert-rutkowski85]

Bump - it seems like a simple and useful change.