修复seeder错误；删除第三方的think迁移工具，在extend中重新实现；

extend/think/migration/helper.php

@@ -0,0 +1,40 @@
+<?php
+
+use think\migration\Factory;
+use think\migration\FactoryBuilder;
+
+if (!function_exists('factory')) {
+    /**
+     * Create a model factory builder for a given class, name, and amount.
+     *
+     * @param mixed  class|class,name|class,amount|class,name,amount
+     * @return FactoryBuilder
+     */
+    function factory()
+    {
+        /** @var Factory $factory */
+        $factory = app(Factory::class);
+
+        $arguments = func_get_args();
+
+        if (isset($arguments[1]) && is_string($arguments[1])) {
+            return $factory->of($arguments[0], $arguments[1])->times($arguments[2] ?? null);
+        } elseif (isset($arguments[1])) {
+            return $factory->of($arguments[0])->times($arguments[1]);
+        }
+
+        return $factory->of($arguments[0]);
+    }
+}
+
+if (!function_exists('database_path')) {
+    /**
+     * 获取数据迁移脚本地址
+     * @param string $path
+     * @return string
+     */
+    function database_path($path = '')
+    {
+        return app()->getRootPath() . 'database' . DIRECTORY_SEPARATOR . $path;
+    }
+}