Feature/3556 dependency updates and maintenance

[turegjorup]

• Remove support for PHP 8.1 and 8.2
• Remove support for Symfony versions lower than 6.4
• Bump dependency requirements

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.50%. Comparing base (8ab0b9c) to head (47c961a).

Additional details and impacted files

@@              Coverage Diff              @@
##             develop      #23      +/-   ##
=============================================
- Coverage      75.09%   74.50%   -0.59%     
  Complexity        54       54              
=============================================
  Files              9        9              
  Lines            261      255       -6     
=============================================
- Hits             196      190       -6     
  Misses            65       65              

Flag	Coverage Δ
unittests	74.50% <100.00%> (-0.59%)	⬇️

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