Add EnableColorsStdout

[mattn]

No description provided.

[codecov-io]

Codecov Report

Merging #46 into master will decrease coverage by 10%.
The diff coverage is 0%.

@@          Coverage Diff          @@
##           master   #46    +/-   ##
=====================================
- Coverage     100%   90%   -10%     
=====================================
  Files           2     2            
  Lines          36    40     +4     
=====================================
  Hits           36    36            
- Misses          0     4     +4

Impacted Files	Coverage Δ
colorable_others.go	66.66% <0%> (-33.34%)	⬇️

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