升级 qiniu/go-sdk 到 v7.9.3

[bachue]

变更背景描述

Qshell 使用 qnupload 和 qnupload2 上传多个文件时，因为复用 putPolicy，在 qiniu/go-sdk v7.9.2 及其之前的版本里，如果 putPolicy 被多次调用 UploadToken 方法签发，则签发的 Upload Token 的 deadline 不会随着时间的推移而改动。需要修复这个问题。

jira issue链接

https://jira.qiniu.io/browse/KODO-11993

主要变更点

• fix bug
• new feature
• 不兼容变更

Checklist

• 已自测
• 已更新Readme

[codecov]

Codecov Report

Merging #304 (ecba09a) into master (bf7a6a0) will not change coverage.
The diff coverage is n/a.

❗ Current head ecba09a differs from pull request most recent head 4c29874. Consider uploading reports for the commit 4c29874 to get more accurate results

@@          Coverage Diff           @@
##           master    #304   +/-   ##
======================================
  Coverage    6.31%   6.31%           
======================================
  Files          40      40           
  Lines        4594    4594           
======================================
  Hits          290     290           
  Misses       4299    4299           
  Partials        5       5           

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[sxci]

lgtm

[sxci]

/approve

[qiniu-bot]

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