Fix: Drop support for PHP 7.2

[localheinz]

This pull request

• drops support for PHP 7.2

[codecov]

Codecov Report

Merging #407 (8762025) into main (5750f9c) will not change coverage.
The diff coverage is n/a.

❗ Current head 8762025 differs from pull request most recent head 969ace5. Consider uploading reports for the commit 969ace5 to get more accurate results

@@             Coverage Diff             @@
##                main      #407   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity         8         8           
===========================================
  Files              2         2           
  Lines             24        24           
===========================================
  Hits              24        24           

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