Fix StringEndsWith matches too loosely (numeric strings)

[guilliamxavier]

Fixes #3461 (for 7.5 since 6.5 support just ended)

[codecov]

Codecov Report

Merging #3505 into 7.5 will not change coverage.
The diff coverage is 100%.

@@            Coverage Diff            @@
##                7.5    #3505   +/-   ##
=========================================
  Coverage     83.38%   83.38%           
  Complexity     3623     3623           
=========================================
  Files           143      143           
  Lines          9648     9648           
=========================================
  Hits           8045     8045           
  Misses         1603     1603

Impacted Files	Coverage Δ	Complexity Δ
src/Framework/Constraint/StringEndsWith.php	100% <100%> (ø)	3 <0> (ø)	⬇️
src/Runner/Version.php	66.66% <0%> (ø)	8% <0%> (ø)	⬇️

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