chore: upgrade laravel/tinker to v3

[128na]

概要

laravel/tinker を v2.11 → v3.0.2 へアップグレード。

方針

• composer の platform は既に PHP 8.3.30 に固定済みのため、PHP 8.4 専用依存（Symfony 8 等）を引き込まずに解決。
• Laravel は 12 のまま据え置き（prod が PHP 8.3。Laravel 13.3+ は Symfony 8 経由で実質 PHP 8.4 を要求するため）。

検証（ローカル）

• composer update laravel/tinker --with-all-dependencies → セキュリティ勧告 0 件 ✅
• pint --test ✅
• phpstan analyse ✅ No errors
• php artisan test ✅ 23 passed
• php artisan tinker REPL 動作確認 ✅

🤖 Generated with Claude Code

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[gemini-code-assist]

Code Review

This pull request updates the dependency constraints in composer.json to upgrade laravel/tinker from ^2.11.1 to ^3.0. Consequently, composer.lock has been updated to lock laravel/tinker at version v3.0.2, along with minor updates to other dependencies including guzzlehttp/guzzle, guzzlehttp/psr7, and nesbot/carbon. There are no review comments, and I have no additional feedback to provide.

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