Handle yanked version in update

[lucklove]

Fix #177

Signed-off-by: lucklove gnu.crazier@gmail.com

[codecov-commenter]

Codecov Report

Merging #635 into master will increase coverage by 0.10%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #635      +/-   ##
==========================================
+ Coverage   47.38%   47.48%   +0.10%     
==========================================
  Files         227      227              
  Lines       17137    17142       +5     
==========================================
+ Hits         8120     8140      +20     
+ Misses       7914     7894      -20     
- Partials     1103     1108       +5     

Flag	Coverage Δ
#coverage	47.48% <ø> (+0.10%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...c/github.com/pingcap/tiup/pkg/cluster/api/pdapi.go	53.65% <0.00%> (-1.22%)	⬇️
...b.com/pingcap/tiup/pkg/repository/v1_repository.go	66.75% <0.00%> (+0.42%)	⬆️
...m/pingcap/tiup/components/playground/playground.go	30.33% <0.00%> (+0.96%)	⬆️
go/src/github.com/pingcap/tiup/pkg/utils/ioutil.go	47.54% <0.00%> (+10.65%)	⬆️

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[lonng]

/merge

[ti-srebot]

/run-all-tests

[ti-srebot]

@lucklove merge failed.