Fix: Use foreach instead of array_map() in UuidStringConversionBench

[localheinz]

This pull request

• uses foreach instead of array_map() in UuidStringConversionBench

❗ Blocks #642.

💁‍♂️ Maybe it would be better to run the

• coding-standards
• static-analysis

with locked dependencies instead?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.13%. Comparing base (da5b521) to head (d8629c1).

Additional details and impacted files

@@            Coverage Diff            @@
##                4.x     #643   +/-   ##
=========================================
  Coverage     95.13%   95.13%           
  Complexity      576      576           
=========================================
  Files            71       71           
  Lines          1645     1645           
=========================================
  Hits           1565     1565           
  Misses           80       80