Add support for resolvers option

[matsuyoshi30]

Closes #85

[codecov-io]

Codecov Report

Merging #87 (a715d46) into master (04b67c9) will increase coverage by 0.05%.
The diff coverage is 63.64%.

@@            Coverage Diff             @@
##           master      #87      +/-   ##
==========================================
+ Coverage   71.62%   71.66%   +0.05%     
==========================================
  Files           8        8              
  Lines         546      568      +22     
==========================================
+ Hits          391      407      +16     
- Misses        125      127       +2     
- Partials       30       34       +4     

Impacted Files	Coverage Δ
attacker/attacker.go	68.63% <ø> (ø)
main.go	73.29% <63.64%> (-1.71%)	⬇️
gui/drawer.go	74.02% <0.00%> (+1.58%)	⬆️

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[nakabonne]

@matsuyoshi30 Hi, thanks for your contribution! I'll take a look later 😄

[nakabonne]

Sorry for the delay. I'm in the middle of something, so I'll take a look this weekend.

[nakabonne]

Thank you for the well-tested patch! Looks pretty neat :D

[matsuyoshi30]

Thanks for great opportunity 👍