Fix: Use array_reduce()

[localheinz]

This pull request

• uses array_reduce()

[codecov]

Codecov Report

Merging #617 (3a464db) into main (a8203cb) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##               main     #617   +/-   ##
=========================================
  Coverage     99.02%   99.03%           
+ Complexity      148      147    -1     
=========================================
  Files            32       32           
  Lines           513      516    +3     
=========================================
+ Hits            508      511    +3     
  Misses            5        5           

Impacted Files	Coverage Δ
src/ChainNormalizer.php	100.00% <100.00%> (ø)

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