refactor(types): widen Component type to include consutructor types

returned from `defineComponent`

ref: https://github.com/vuejs/vue-router-next/pull/421
also close #1880

Previous `Component` type is now exported as `ConcreteComponent`.

This introduces a minor breaking change when calling `h(comp, { ... })`
will now fail if `comp` is a of generic `Component` type, since it does
not specify what props it expects.

packages/runtime-core/src/vnode.ts

@@ -15,8 +15,9 @@ import {
 import {
   ComponentInternalInstance,
   Data,
-  Component,
-  ClassComponent
+  ConcreteComponent,
+  ClassComponent,
+  Component
 } from './component'
 import { RawSlots } from './componentSlots'
 import { isProxy, Ref, toRaw } from '@vue/reactivity'
@@ -244,7 +245,7 @@ export function isSameVNodeType(n1: VNode, n2: VNode): boolean {
   if (
     __DEV__ &&
     n2.shapeFlag & ShapeFlags.COMPONENT &&
-    hmrDirtyComponents.has(n2.type as Component)
+    hmrDirtyComponents.has(n2.type as ConcreteComponent)
   ) {
     // HMR only: if the component has been hot-updated, force a reload.
     return false