Fix: Deprecate assertions

[localheinz]

This pull request

• deprecates assertions

[codecov]

Codecov Report

Merging #548 (9bb739f) into main (591b6aa) will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff             @@
##                main      #548   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity        87        87           
===========================================
  Files             12        12           
  Lines            321       321           
===========================================
  Hits             321       321           

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

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