[1.7.0] Add DB storage driver (#82)

assets/migrations/2019_08_08_000000_create_tenants_table.php

@@ -0,0 +1,35 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class CreateTenantsTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('tenants', function (Blueprint $table) {
+            $table->string('uuid', 36)->primary(); // don't change this
+            $table->string('domain', 255)->index(); // don't change this
+
+            // your indexed columns go here
+
+            $table->json('data')->default('{}');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::drop('tenants');
+    }
+}