[jquery] Collapse JQuery declarations.

Base types were declared separately because JQuery was a class at one point. This used class-interface merging to avoid having to declare base type members.

types/jquery/index.d.ts

@@ -38,7 +38,7 @@ declare const $: JQueryStatic;
 // Used by JQuery.Event
 type _Event = Event;
 
-interface JQuery<TElement extends Node = HTMLElement> {
+interface JQuery<TElement extends Node = HTMLElement> extends Iterable<TElement> {
     /**
      * A string containing the jQuery version number.
      *
@@ -2394,8 +2394,6 @@ interface JQuery<TElement extends Node = HTMLElement> {
     [n: number]: TElement;
 }
 
-interface JQuery<TElement extends Node = HTMLElement> extends Iterable<TElement> { }
-
 interface JQueryStatic<TElement extends Node = HTMLElement> {
     /**
      * A factory function that returns a chainable utility object with methods to register multiple