feat: add php 8.3 compatibility

[jackraymund]

As in ticket
#265

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ddc0d97) 96.08% compared to head (1b4b596) 96.08%.

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Additional details and impacted files

@@            Coverage Diff            @@
##             master     #266   +/-   ##
=========================================
  Coverage     96.08%   96.08%           
  Complexity      193      193           
=========================================
  Files            36       36           
  Lines           638      638           
=========================================
  Hits            613      613           
  Misses           25       25           

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[matchish]

Could you add 8.3 to matrix as well?
https://github.com/matchish/laravel-scout-elasticsearch/blob/master/.github/workflows/test-application.yaml

[jackraymund]

Could you add 8.3 to matrix as well? https://github.com/matchish/laravel-scout-elasticsearch/blob/master/.github/workflows/test-application.yaml

Just added.