fix: dts head

Author: lishaobos

src/core/declaration.ts

@@ -116,6 +116,8 @@ export function getDeclaration(ctx: Context, filepath: string, originalImports?:
 
   const head = `export {}
 
+import { GlobalComponents } from 'vue'
+
 declare module 'vue' {`
 
   let code = `/* eslint-disable */