wip: migrate to livewire 3

resources/views/livewire/dev/s3-test.blade.php

@@ -1,6 +1,6 @@
 <div>
     <h2>S3 Test</h2>
-    <form wire:submit.prevent="save">
+    <form wire:submit="save">
         <input type="file" wire:model="file">
         @error('file')
             <span class="error">{{ $message }}</span>