chore: update build to support PHP 8.5

[karel-rehor]

Proposed Changes

• remove support for php-7.2,
  • some dependencies require php-7.3 or higher, see last broken build
  • N.B. removing support for this version in the CI pipeline is the quickest solution for a library we are now only maintaining.
• add support for php-8.5
  • php 8.5.8 - was recently released and changes proposed in comunity supplied fix: fix PHP 8.5 deprecations #170 should stabilize this build.
  • community supplied fix: fix PHP 8.5 deprecations #170 also shows community interest in maintaining support for this library for this PHP release.

Checklist

• CHANGELOG.md updated
• Rebased/mergeable
• [] A test has been added if appropriate - N.A.
• make test completes successfully
• Commit messages are conventional
• Sign CLA (if not already signed)

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.09%. Comparing base (a46954b) to head (867b661).
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Additional details and impacted files

@@            Coverage Diff            @@
##             master     #171   +/-   ##
=========================================
  Coverage     75.09%   75.09%           
  Complexity      455      455           
=========================================
  Files            25       25           
  Lines          1104     1104           
=========================================
  Hits            829      829           
  Misses          275      275           

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[alespour]

LGTM!