Fix deprecated PHP patterns for PHP 8.2–8.5+ compatibility

[Copilot]

• Fix composer.json PHP constraint to >=8.0.0
• Remove PHP 7.3 and 7.4 from CI matrix (they can't satisfy >=8.0.0)
• Move the lowest-composer include from PHP 7.3 to PHP 8.0

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This change is 

[coveralls]

coverage: 89.237% (-1.2%) from 90.439% — copilot/find-and-fix-deprecated-code into master

[voku]

/gemini review

[gemini-code-assist]

Code Review

This pull request enhances PHP 8 compatibility by introducing nullable type hints across various methods and applying the AllowDynamicProperties attribute to the ArrayyMeta class. It also updates the PHPUnit configuration and adds PHPStan as a development dependency. Review feedback identifies a critical compatibility issue with Closure::fromCallable() on PHP 7.0, recommends using a more specific version constraint for PHPStan to ensure build stability, and suggests refactoring the ArrayyMeta class to avoid dynamic properties for improved maintainability.

[gemini-code-assist]

The use of \Closure::fromCallable() will cause a fatal error on PHP 7.0, as it was introduced in PHP 7.1. According to composer.json, this project still supports PHP 7.0.

To resolve this while maintaining compatibility, you can use [static::class, 'objectToArray'] which works on PHP 7.0 and is not deprecated.

        return \array_map([static::class, 'objectToArray'], $object);

[gemini-code-assist]

Using "*" as a version constraint for phpstan/phpstan is not recommended as it can pull in major versions with breaking changes, potentially causing your CI/builds to fail unexpectedly. It's better to use a more restrictive constraint, for example "^1.0", to ensure stability.

Suggested change

	"phpstan/phpstan": "*"
	"phpstan/phpstan": "^1.0"

[gemini-code-assist]

While #[AllowDynamicProperties] makes the code compatible with PHP 8.2, it's generally better to avoid dynamic properties for improved maintainability and type safety. Consider refactoring this class to use a private array for storing properties and leverage __get() and __set() magic methods to manage them. This would make the class structure more explicit and robust.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.77%. Comparing base (e88173f) to head (ce22716).

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #151      +/-   ##
============================================
- Coverage     90.45%   89.77%   -0.69%     
+ Complexity     1138     1083      -55     
============================================
  Files            39       39              
  Lines          3196     3139      -57     
============================================
- Hits           2891     2818      -73     
- Misses          305      321      +16     

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[sonarqubecloud]

Quality Gate failed

Failed conditions
2 Security Hotspots

See analysis details on SonarQube Cloud