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

extend/phinx/Db/Action/DropForeignKey.php

@@ -0,0 +1,68 @@
+<?php
+
+/**
+ * MIT License
+ * For full license information, please view the LICENSE file that was distributed with this source code.
+ */
+
+namespace Phinx\Db\Action;
+
+use Phinx\Db\Table\ForeignKey;
+use Phinx\Db\Table\Table;
+
+class DropForeignKey extends Action
+{
+    /**
+     * The foreign key to remove
+     *
+     * @var \Phinx\Db\Table\ForeignKey
+     */
+    protected $foreignKey;
+
+    /**
+     * Constructor
+     *
+     * @param \Phinx\Db\Table\Table $table The table to remove the constraint from
+     * @param \Phinx\Db\Table\ForeignKey $foreignKey The foreign key to remove
+     */
+    public function __construct(Table $table, ForeignKey $foreignKey)
+    {
+        parent::__construct($table);
+        $this->foreignKey = $foreignKey;
+    }
+
+    /**
+     * Creates a new DropForeignKey object after building the ForeignKey
+     * definition out of the passed arguments.
+     *
+     * @param \Phinx\Db\Table\Table $table The table to delete the foreign key from
+     * @param string|string[] $columns The columns participating in the foreign key
+     * @param string|null $constraint The constraint name
+     * @return static
+     */
+    public static function build(Table $table, $columns, ?string $constraint = null)
+    {
+        if (is_string($columns)) {
+            $columns = [$columns];
+        }
+
+        $foreignKey = new ForeignKey();
+        $foreignKey->setColumns($columns);
+
+        if ($constraint) {
+            $foreignKey->setConstraint($constraint);
+        }
+
+        return new static($table, $foreignKey);
+    }
+
+    /**
+     * Returns the foreign key to remove
+     *
+     * @return \Phinx\Db\Table\ForeignKey
+     */
+    public function getForeignKey(): ForeignKey
+    {
+        return $this->foreignKey;
+    }
+}