types: use stricter HostNode typings

packages/runtime-dom/src/index.ts

@@ -1,14 +1,18 @@
-import { createRenderer, VNode, createAppAPI } from '@vue/runtime-core'
+import { createRenderer } from '@vue/runtime-core'
 import { nodeOps } from './nodeOps'
 import { patchProp } from './patchProp'
 
-export const render = createRenderer({
+const { render, createApp } = createRenderer<Node, Element>({
   patchProp,
   ...nodeOps
-}) as (vnode: VNode | null, container: HTMLElement) => void
+})
 
-export const createApp = createAppAPI(render)
+export { render, createApp }
 
 // re-export everything from core
 // h, Component, reactivity API, nextTick, flags & types
 export * from '@vue/runtime-core'
+
+export interface ComponentPublicInstance {
+  $el: Element
+}