build: fix build options

Fix #912

Author: posva

packages/nuxt/build.config.ts

@@ -2,8 +2,10 @@ import { defineBuildConfig } from 'unbuild'
 
 export default defineBuildConfig({
   declaration: true,
-  emitCJS: false,
-  cjsBridge: true,
+  rollup: {
+    emitCJS: false,
+    cjsBridge: true,
+  },
   entries: ['src/module', 'src/templates/plugin'],
   externals: ['pinia', '@nuxt/kit-edge', '@nuxt/types'],
 })