use 99designs/keyring instead of zalando/go-keyring

[kyoh86]

wip

[codecov]

Codecov Report

Merging #71 (153f66d) into master (dd19970) will decrease coverage by 0.83%.
The diff coverage is 25.00%.

@@            Coverage Diff             @@
##           master      #71      +/-   ##
==========================================
- Coverage   71.83%   71.00%   -0.84%     
==========================================
  Files          25       25              
  Lines         632      638       +6     
==========================================
- Hits          454      453       -1     
- Misses        140      145       +5     
- Partials       38       40       +2     

Impacted Files	Coverage Δ
command/fork.go	95.55% <ø> (ø)
command/setup.go	0.00% <0.00%> (ø)
command/config.go	75.00% <42.85%> (-8.79%)	⬇️

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