fix(nuxt): hook syntax for provider register

Author: Novout

packages/nuxt/src/runtime/plugin.ts

@@ -1,10 +1,6 @@
 import { defineNuxtPlugin } from '#app'
 import PDFEASY from 'pdfeasy'
 
-export default defineNuxtPlugin(() => {
-  return {
-    provide: {
-      pdf: PDFEASY as typeof PDFEASY
-    }
-  }
+export default defineNuxtPlugin(({ provide }) => {
+  provide('pdf', PDFEASY as typeof PDFEASY)
 })