Test class run in a separate PHP process are passing when "exit" called inside

[kubawerlos]

• adding a test with incorrect behaviour
• updating the test with expected behaviour
• adding fix

[codecov]

Codecov Report

Merging #3968 into 7.5 will increase coverage by 0.1%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##                7.5    #3968     +/-   ##
===========================================
+ Coverage     83.49%   83.59%   +0.1%     
- Complexity     3652     3653      +1     
===========================================
  Files           143      143             
  Lines          9744     9749      +5     
===========================================
+ Hits           8136     8150     +14     
+ Misses         1608     1599      -9

Impacted Files	Coverage Δ	Complexity Δ
src/Util/PHP/AbstractPhpProcess.php	72.6% <100%> (+0.97%)	41 <0> (+1)	⬆️
src/Runner/Version.php	66.66% <0%> (ø)	8% <0%> (ø)	⬇️
src/Framework/TestResult.php	75.85% <0%> (+2.19%)	170% <0%> (ø)	⬇️

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