Upgrade cache dependency for reconnection support

[premtsd-code]

Summary

• Upgrade utopia-php/cache to 1.0.* for reconnection support
• Upgrade phpunit to 9.6.*
• Pin doctrine/instantiator to 2.0.0 for PHP 8.2/8.3 compatibility

Test plan

• Run composer install to verify dependencies resolve
• Run composer test to verify tests pass

Summary by CodeRabbit

• Chores
  • Updated cache library dependency to latest major version.
  • Upgraded testing framework to newer version.
  • Added new development dependency for testing infrastructure.
  • No functional changes to application logic or public APIs.

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[coderabbitai]

Walkthrough

The pull request updates dependency versions in composer.json. The utopia-php/cache package is upgraded from version 0.13.* to 1.0.* in the require section. In require-dev, phpunit/phpunit is upgraded from ^9.3 to 9.6.*. Additionally, a new dev dependency doctrine/instantiator at version 2.0.0 is introduced. The changes result in a net modification of +4 and -3 lines. No functional logic changes are present.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Upgrade cache dependency for reconnection support' accurately reflects the primary change: upgrading utopia-php/cache to 1.0.* for reconnection support.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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