[增添]添加了datasource的setting数据库以及默认值

vendor/anourvalar/eloquent-serialize/src/Package.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace AnourValar\EloquentSerialize;
+
+class Package
+{
+    /**
+     * $var array
+     */
+    private $data;
+
+    /**
+     * @param array $data
+     * @return void
+     */
+    public function __construct(array $data)
+    {
+        $this->data = $data;
+    }
+
+    /**
+     * @param string $key
+     * @return mixed
+     */
+    public function get(string $key = null)
+    {
+        if (is_null($key)) {
+            return $this->data;
+        }
+
+        return ($this->data[$key] ?? null);
+    }
+}