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/Creator.php

@@ -0,0 +1,77 @@
+<?php
+
+namespace think\migration;
+
+use InvalidArgumentException;
+use Phinx\Util\Util;
+use RuntimeException;
+use think\App;
+
+class Creator
+{
+
+    protected $app;
+
+    public function __construct(App $app)
+    {
+        $this->app = $app;
+    }
+
+    public function create(string $className)
+    {
+        $path = $this->ensureDirectory();
+
+        if (!Util::isValidPhinxClassName($className)) {
+            throw new InvalidArgumentException(sprintf('The migration class name "%s" is invalid. Please use CamelCase format.', $className));
+        }
+
+        if (!Util::isUniqueMigrationClassName($className, $path)) {
+            throw new InvalidArgumentException(sprintf('The migration class name "%s" already exists', $className));
+        }
+
+        // Compute the file path
+        $fileName = Util::mapClassNameToFileName($className);
+        $filePath = $path . DIRECTORY_SEPARATOR . $fileName;
+
+        if (is_file($filePath)) {
+            throw new InvalidArgumentException(sprintf('The file "%s" already exists', $filePath));
+        }
+
+        // Verify that the template creation class (or the aliased class) exists and that it implements the required interface.
+        $aliasedClassName = null;
+
+        // Load the alternative template if it is defined.
+        $contents = file_get_contents($this->getTemplate());
+
+        // inject the class names appropriate to this migration
+        $contents = strtr($contents, [
+            'MigratorClass' => $className,
+        ]);
+
+        if (false === file_put_contents($filePath, $contents)) {
+            throw new RuntimeException(sprintf('The file "%s" could not be written to', $path));
+        }
+
+        return $filePath;
+    }
+
+    protected function ensureDirectory()
+    {
+        $path = $this->app->getRootPath() . 'database' . DIRECTORY_SEPARATOR . 'migrations';
+
+        if (!is_dir($path) && !mkdir($path, 0755, true)) {
+            throw new InvalidArgumentException(sprintf('directory "%s" does not exist', $path));
+        }
+
+        if (!is_writable($path)) {
+            throw new InvalidArgumentException(sprintf('directory "%s" is not writable', $path));
+        }
+
+        return $path;
+    }
+
+    protected function getTemplate()
+    {
+        return __DIR__ . '/command/stubs/migrate.stub';
+    }
+}