Fixed diamond symbol on windows CMD

[glneto]

Hello!

This change should fix the diamond symbol on Windows' CMD.
I used the is-windows util to check the user env and in case that returns true, I use the Black Diamond Suit (as suggested on the issue), otherwise I keep the black medium diamond symbol.

I hope that helps.

Fixes #112

[olistic]

Hello @glneto! Thanks for the patch! I prefer not to add a dependency just for this. Let's always use the Black Diamond Suit character, independently of the platform.

[codecov-io]

Codecov Report

Merging #121 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #121   +/-   ##
=======================================
  Coverage   90.87%   90.87%           
=======================================
  Files          80       80           
  Lines        1019     1019           
  Branches      158      158           
=======================================
  Hits          926      926           
  Misses         77       77           
  Partials       16       16

Impacted Files	Coverage Δ
...ackages/warriorjs-cli/src/ui/printWarriorStatus.js	100% <ø> (ø)	⬆️

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[glneto]

@olistic Alright! I didn't see the is-windows package wasn't being used. Should be good now :)