sdk: rolling update for 1.2.8-release

[ucloud-bot]

No description provided.

[codecov-commenter]

Codecov Report

Merging #60 (f87a134) into master (eb9a611) will decrease coverage by 0.29%.
The diff coverage is 0.00%.

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@@             Coverage Diff              @@
##             master      #60      +/-   ##
============================================
- Coverage     87.37%   87.09%   -0.29%     
  Complexity      124      124              
============================================
  Files            16       16              
  Lines           309      310       +1     
  Branches         28       28              
============================================
  Hits            270      270              
- Misses           28       29       +1     
  Partials         11       11              

Impacted Files	Coverage Δ
...in/java/cn/ucloud/common/client/DefaultClient.java	92.85% <0.00%> (-3.44%)	⬇️
...a/cn/ucloud/common/transport/DefaultTransport.java	59.09% <0.00%> (+1.31%)	⬆️

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