types(Dialog): fix Dialog.Component typing (#5646)

types/component.d.ts

@@ -2,5 +2,6 @@ import Vue from 'vue';
 
 export class VanComponent {
   static name: string;
+
   static install(vue: typeof Vue): void;
 }

types/dialog.d.ts

@@ -34,7 +34,7 @@ export interface Dialog {
   install(): void;
   setDefaultOptions(options: DialogOptions): void;
   resetDefaultOptions(): void;
-  Component: VanComponent;
+  Component: typeof VanComponent;
 }
 
 declare module 'vue/types/vue' {