Update Driver.php

因为有自增接口，数字无法使用序列化

Author: walkor

src/Driver.php

@@ -233,6 +233,10 @@ public function getTagKey(string $tag): string
      */
     protected function serialize($data): string
     {
+        if (is_numeric($data)) {
+            return (string) $data;
+        }
+        
         $serialize = $this->options['serialize'][0] ?? "serialize";
 
         return $serialize($data);