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/apiLifecycle.ts

@@ -5,7 +5,7 @@ import {
   setCurrentInstance,
   isInSSRComponentSetup
 } from './component'
-import { ComponentPublicInstance } from './componentProxy'
+import { ComponentPublicInstance } from './componentPublicInstance'
 import { callWithAsyncErrorHandling, ErrorTypeStrings } from './errorHandling'
 import { warn } from './warning'
 import { capitalize } from '@vue/shared'