Update lib.dom.d.ts: MutationObserverInit.attributeFilter can accept an iterator

[trusktr]

Re-opening of #50031. Please see description there.

Please point me to guidance on how to make this change, and I'll update the PR.

Closes #55990

[typescript-bot]

This PR doesn't have any linked issues. Please open an issue that references this PR. From there we can discuss and prioritise.

[fatcerberus]

The bot pointed you to the relevant documentation in #50031 but basically you have to make changes to the DOM libs at https://github.com/Microsoft/TSJS-lib-generator, because the ones in the TS repo are autogenerated from there.

[jakebailey]

The bot pointed you to the relevant documentation in #50031 but basically you have to make changes to the DOM libs at Microsoft/TSJS-lib-generator, because the ones in the TS repo are autogenerated from there.

That time, they had edited lib, which used to hold a checked-in compiler for self compilation and no longer exists (hence why this hasn't been auto-closed yet). So this PR is "fine" contribution wise. Of course, the PR has syntax error and I'm not convinced it's correct, either.

[fatcerberus]

Hmm, so is TSJS-lib-generator obsolete now?

[jakebailey]

No, there are bits that are generated, and there are bits that aren't. E.g. https://github.com/microsoft/TypeScript/pull/54725/files pulls from the generator but only touches generated files.