A few changes for Deno 2 runtime compatibility

[tjni]

Description

This PR moves a few method calls that were deprecated and removed in Deno 2 to their replacements (except for Deno.metrics(), which was removed without replacement).

This is not a complete set of changes: some dependencies also need to be updated or patched (xmlp is the main one that I'm aware of right now), but testing the waters here with this smaller and simpler one since this is my first contribution.

Checklist

I have (if applicable):

• filed a contributor agreement.
• referenced the GitHub issue this PR closes
• updated the appropriate changelog in the PR
• ensured the present test suite passes
• added new tests
• created a separate documentation PR in Quarto's website repo and linked it to this PR

[tjni]

Regarding the contributor agreement form, what goes in the "fascimile" field?

[cscheid]

Regarding the contributor agreement form, what goes in the "fascimile" field?

A fax number if your company has one - no entry otherwise.

[tjni]

I sent over my signed contributor agreement form. Sorry for the delay.

[cscheid]

Thanks. Can you comment on the Deno.metrics() change?

[tjni]

Sure. As far as I can tell, it was removed without replacement in Deno 2 and first deprecated by denoland/deno#20684. It sounds like maintaining it was deemed too difficult. Beyond that, I don't have any more information.

[cscheid]

That's unfortunate - we were using that to check for stray unresolved promises.

Ok, this looks good, thanks.