Enhancement: Use Php74 rule set

[localheinz]

This pull request

• uses the Php74 rule set
• runs make coding-standards

[codecov]

Codecov Report

Merging #340 (6958545) into main (a5d1d1e) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main     #340   +/-   ##
=========================================
  Coverage     93.18%   93.18%           
  Complexity       88       88           
=========================================
  Files            11       11           
  Lines           176      176           
=========================================
  Hits            164      164           
  Misses           12       12           

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