Add an option to write in a file

[villfa]

Closes #235

[codecov]

Codecov Report

Merging #244 into master will increase coverage by 14.01%.
The diff coverage is 78.57%.

@@              Coverage Diff              @@
##             master     #244       +/-   ##
=============================================
+ Coverage     82.35%   96.36%   +14.01%     
- Complexity      122      128        +6     
=============================================
  Files            21       21               
  Lines           357      358        +1     
=============================================
+ Hits            294      345       +51     
+ Misses           63       13       -50     

Impacted Files	Coverage Δ	Complexity Δ
src/Renderers/Results/ConsoleResultsRenderer.php	100.00% <ø> (+100.00%)	1.00 <0.00> (ø)
src/Command/RunCommand.php	81.81% <78.57%> (ø)	14.00 <6.00> (?)
src/Process/Observer/OnSuccessNull.php	100.00% <0.00%> (+100.00%)	1.00% <0.00%> (ø%)

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