Add compatibilty with Symfony 5

[villfa]

No description provided.

[codecov]

Codecov Report

Merging #226 into master will decrease coverage by 0.71%.
The diff coverage is 80.00%.

@@             Coverage Diff              @@
##             master     #226      +/-   ##
============================================
- Coverage     79.19%   78.48%   -0.72%     
+ Complexity      109      107       -2     
============================================
  Files            17       17              
  Lines           322      316       -6     
============================================
- Hits            255      248       -7     
- Misses           67       68       +1     

Impacted Files	Coverage Δ	Complexity Δ
src/Commands/ChurnCommand.php	0.00% <0.00%> (ø)	6.00 <1.00> (ø)
src/Factories/ProcessFactory.php	100.00% <100.00%> (ø)	3.00 <0.00> (ø)
src/Results/ResultsParser.php	100.00% <100.00%> (ø)	3.00 <0.00> (-2.00)

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