Enhancement: Pull in Helper from ergebnis/test-util

[localheinz]

This pull request

• pulls in the in Helper trait from ergebnis/test-util

[codecov]

Codecov Report

Merging #462 (ba2413b) into main (c260c33) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main     #462   +/-   ##
=========================================
  Coverage     97.24%   97.24%           
  Complexity       50       50           
=========================================
  Files             6        6           
  Lines           145      145           
=========================================
  Hits            141      141           
  Misses            4        4           

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