vague first draft of v3. TenantModelTest is passing

src/Events/Contracts/TenantEvent.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace Stancl\Tenancy\Events\Contracts;
+
+use Illuminate\Queue\SerializesModels;
+use Stancl\Tenancy\Database\Models\Tenant;
+
+abstract class TenantEvent
+{
+    use SerializesModels;
+
+    /** @var Tenant */
+    public $tenant;
+
+    public function __construct(Tenant $tenant)
+    {
+        $this->tenant = $tenant;
+    }
+}