fix：修复uploadSliceItem

Author: livehigh

package.json

@@ -1,6 +1,6 @@
 {
   "name": "cos-nodejs-sdk-v5",
-  "version": "2.10.9",
+  "version": "2.10.10",
   "description": "cos nodejs sdk v5",
   "main": "index.js",
   "types": "index.d.ts",

sdk/advance.js

@@ -577,6 +577,7 @@ function uploadSliceItem(params, callback) {
     var ServerSideEncryption = params.ServerSideEncryption;
     var UploadData = params.UploadData;
     var ChunkRetryTimes = self.options.ChunkRetryTimes + 1;
+    var Headers = params.Headers || {};
 
     var start = SliceSize * (PartNumber - 1);