fix: 修改几处不严格的变量类型

src/Http/SdkRequest.php

@@ -165,7 +165,7 @@ class SdkRequest extends Request
      */
     public function withRequestID(?string $uuid = null): self
     {
-        $this->uuid = $uuid;
+        $this->uuid = $uuid ?? "";
         $RequestIDMiddleware = new RequestIDMiddleware($this->uuid);
         $this->middlewares[] = $RequestIDMiddleware;
         return $this;

src/Option.php

@@ -122,8 +122,7 @@ abstract class Option
      */
     public function getAuthExpires(): int
     {
-
-        return static::AUTH_CACHE_EXPIRES_AT ?? 30000;
+        return empty(static::AUTH_CACHE_EXPIRES_AT) ? self::AUTH_CACHE_EXPIRES_AT : static::AUTH_CACHE_EXPIRES_AT;
     }
 
     /**