fix:更新已知bug,优化代码

vendor/guzzlehttp/psr7/src/MultipartStream.php

@@ -34,7 +34,7 @@ final class MultipartStream implements StreamInterface
      */
     public function __construct(array $elements = [], string $boundary = null)
     {
-        $this->boundary = $boundary ?: sha1(uniqid('', true));
+        $this->boundary = $boundary ?: bin2hex(random_bytes(20));
         $this->stream = $this->createStream($elements);
     }