add -s quiet flag

[ldemailly]

Fixes #12

[codecov]

Codecov Report

Base: 95.51% // Head: 95.70% // Increases project coverage by +0.19% 🎉

Coverage data is based on head (4bcba6f) compared to base (891326c).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #11      +/-   ##
==========================================
+ Coverage   95.51%   95.70%   +0.19%     
==========================================
  Files           2        2              
  Lines         156      163       +7     
==========================================
+ Hits          149      156       +7     
  Misses          5        5              
  Partials        2        2              

Impacted Files	Coverage Δ
cli/main.go	100.00% <100.00%> (ø)
mc/mc.go	94.01% <100.00%> (+0.15%)	⬆️

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