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/warning.ts

@@ -2,7 +2,7 @@ import { VNode } from './vnode'
 import {
   Data,
   ComponentInternalInstance,
-  Component,
+  ConcreteComponent,
   formatComponentName
 } from './component'
 import { isString, isFunction } from '@vue/shared'
@@ -10,7 +10,7 @@ import { toRaw, isRef, pauseTracking, resetTracking } from '@vue/reactivity'
 import { callWithErrorHandling, ErrorCodes } from './errorHandling'
 
 type ComponentVNode = VNode & {
-  type: Component
+  type: ConcreteComponent
 }
 
 const stack: VNode[] = []