Enhance types of standard HTML attributes using Type Literals (ex: input "type")

[LolliDepp]

None of the DOM types exposed by /types/dom.d.ts are using the Type Literals feature - and it would work great I think.

Example: this is the current declaration for the "type" attribute on the "input" interface: type?: string; A more accurate type definition would be: type?: 'text' | 'button' | 'submit'; // other literals are omitted for brevity

this will allow intellisense to suggest possible values for type.

same if true for other attributes