[patch] add go binary version during build time

[WindzCUHK]

details: yahoojapan/athenz-client-sidecar#25

[codecov-io]

Codecov Report

Merging #43 into master will decrease coverage by 0.29%.
The diff coverage is 40%.

@@            Coverage Diff            @@
##           master      #43     +/-   ##
=========================================
- Coverage   85.86%   85.56%   -0.3%     
=========================================
  Files          14       14             
  Lines         580      589      +9     
=========================================
+ Hits          498      504      +6     
- Misses         71       75      +4     
+ Partials       11       10      -1

Impacted Files	Coverage Δ
main.go	43.75% <40%> (+2.9%)	⬆️

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[WindzCUHK]

pipeline output:
https://app.circleci.com/jobs/github/yahoojapan/authorization-proxy/607/parallel-runs/0/steps/0-103
https://app.circleci.com/jobs/github/yahoojapan/authorization-proxy/609/parallel-runs/0/steps/0-106