Wall of warnings from `npm run test`

[TheMrCam]

Running npm test results in a wall of the following warnings:

(node:83479) ExperimentalWarning: VM Modules is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
(node:83470) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
(Use `node --trace-deprecation ...` to show where the warning was created)
(node:83468) ExperimentalWarning: VM Modules is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
(node:83469) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
(Use `node --trace-deprecation ...` to show where the warning was created)
(node:83472) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
(Use `node --trace-deprecation ...` to show where the warning was created)
(node:82094) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
(Use `node --trace-deprecation ...` to show where the warning was created)

Details

While the (node:XXX) trace is varied, I see only two distinct errors:

ExperimentalWarning: VM Modules is an experimental feature and might change at any time

[DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.

I believe the first is due to NODE_OPTIONS=--experimental-vm-modules in the script, which used to be necessary IIRC but can likely be removed now with a couple dependency upgrades.

I'm not certain about the second error, but it'll likely also be removed with dependency upgrades. Otherwise we'll need to "use a userland alternative instead."