Important changes for 4.2

[orta]

• Deprecations were added to a lot of DOM types in Create deprecatedjson from mdn web #884
• The Streams API was updated in Update Streams to official WebIDL #890 - this removed some APIs which weren't supported by browsers and updated the name of some types to match the updated specification.
• Localization APIs now have exact types:

  const dateOptions = {
     weekday: "long",
     year: "numeric",
     month: "long",
     day: "numeric",
   };

   const date = new Date().toLocaleString("en-US", dateOptions);

would now need to be

   const date = new Date().toLocaleString("en-US", {
     weekday: "long",
     year: "numeric",
     month: "long",
     day: "numeric",
   });

Or to use as const

[HolgerJeromin]

Can/should we update the typing of querySelector, querySelectorAll and closest, too?

Ref #885 (comment)

[orta]

It was, I used this issue to keep track of breaking changes