Optimize versionrule.go

[little-cui]

No description provided.

[codecov-io]

Codecov Report

Merging #126 into master will increase coverage by 0.19%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #126      +/-   ##
==========================================
+ Coverage    67.2%   67.39%   +0.19%     
==========================================
  Files          18       18              
  Lines        4184     4190       +6     
==========================================
+ Hits         2812     2824      +12     
+ Misses       1195     1192       -3     
+ Partials      177      174       -3

Impacted Files	Coverage Δ
server/service/util/versionrule.go	100% <100%> (ø)	⬆️
server/service/instances.go	67.03% <100%> (+0.18%)	⬆️
server/service/services_dependency.go	68.3% <0%> (+0.7%)	⬆️
server/service/governservice.go	65.53% <0%> (+1.45%)	⬆️

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[coveralls]

Coverage increased (+0.1%) to 71.159% when pulling 70418c7 on little-cui:master into fa2904b on ServiceComb:master.

[coveralls]

Coverage increased (+0.1%) to 71.751% when pulling 8c46163 on little-cui:master into 160520a on ServiceComb:master.