build: add npm install to setup script

Author: SlimDeluxe

composer.json

@@ -70,6 +70,7 @@
             "@php vendor/bin/testbench serve --ansi"
         ],
         "setup": [
+            "npm install",
             "@php vendor/bin/testbench vendor:publish --provider='Spatie\\Permission\\PermissionServiceProvider'",
             "@php vendor/bin/testbench vendor:publish --tag='filament-shield-config'",
             "@php vendor/bin/testbench package:sync-skeleton"