fix(nuxt): remove postinstall script

Author: posva

packages/nuxt/package.json

@@ -29,7 +29,7 @@
     "changelog": "conventional-changelog -p angular -i CHANGELOG.md -s --commit-path . -l nuxt-vuefire -r 1",
     "dev": "nuxi dev playground",
     "dev:build": "nuxi build playground",
-    "postinstall": "nuxt-module-build --stub"
+    "prepare": "nuxt-module-build --stub"
   },
   "dependencies": {
     "@nuxt/kit": "^3.0.0"

packages/nuxt/playground/package.json

@@ -4,7 +4,8 @@
     "build": "nuxt build",
     "dev": "nuxt dev",
     "generate": "nuxt generate",
-    "preview": "nuxt preview"
+    "preview": "nuxt preview",
+    "prepare": "nuxi prepare"
   },
   "devDependencies": {
     "nuxt": "^3.0.0"