Reduce the amount of data stored in memory

[villfa]

Closes #237

[codecov]

Codecov Report

Merging #248 into master will increase coverage by 0.01%.
The diff coverage is 97.98%.

@@             Coverage Diff              @@
##             master     #248      +/-   ##
============================================
+ Coverage     96.36%   96.38%   +0.01%     
- Complexity      128      152      +24     
============================================
  Files            21       20       -1     
  Lines           358      387      +29     
============================================
+ Hits            345      373      +28     
- Misses           13       14       +1     

Impacted Files	Coverage Δ	Complexity Δ
src/Process/ChurnProcess.php	95.23% <ø> (ø)	9.00 <0.00> (ø)
src/Process/ProcessFactory.php	100.00% <ø> (ø)	3.00 <0.00> (ø)
src/Result/ResultsRendererFactory.php	100.00% <ø> (ø)	4.00 <0.00> (?)
src/Command/RunCommand.php	80.76% <84.61%> (-1.05%)	14.00 <5.00> (ø)
src/Process/Handler/ParallelProcessHandler.php	97.50% <97.22%> (-2.50%)	15.00 <10.00> (+4.00)	⬇️
src/File/File.php	100.00% <100.00%> (ø)	3.00 <1.00> (?)
src/File/FileFinder.php	96.15% <100.00%> (ø)	13.00 <7.00> (?)
src/Process/Handler/SequentialProcessHandler.php	100.00% <100.00%> (ø)	4.00 <0.00> (ø)
src/Process/Observer/OnSuccessAccumulate.php	100.00% <100.00%> (ø)	2.00 <2.00> (?)
src/Process/Observer/OnSuccessCollection.php	100.00% <100.00%> (ø)	3.00 <3.00> (?)
... and 11 more

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