取消https验证，并添加vendor文件夹。

vendor/symfony/var-dumper/README.md

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+VarDumper Component
+===================
+
+The VarDumper component provides mechanisms for walking through any arbitrary
+PHP variable. It provides a better `dump()` function that you can use instead
+of `var_dump()`.
+
+Resources
+---------
+
+ * [Documentation](https://symfony.com/doc/current/components/var_dumper/introduction.html)
+ * [Contributing](https://symfony.com/doc/current/contributing/index.html)
+ * [Report issues](https://github.com/symfony/symfony/issues) and
+   [send Pull Requests](https://github.com/symfony/symfony/pulls)
+   in the [main Symfony repository](https://github.com/symfony/symfony)