should inherit component class and vue to pass babel's instance type check

Author: ktsn

src/component.ts

@@ -65,8 +65,12 @@ export function componentFactory (
 
   // find super
   const superProto = Object.getPrototypeOf(Component.prototype)
-  const Super: VueClass = superProto instanceof Vue
-    ? superProto.constructor as VueClass
-    : Vue
-  return Super.extend(options)
+  if (!(superProto instanceof Vue)) {
+    Component.prototype = Object.create(Vue.prototype)
+    Component.prototype.constructor = Component
+    Object.keys(Vue).forEach(key => {
+      Component[key] = Vue[key]
+    })
+  }
+  return Component.extend(options)
 }