Upgrade to Laravel 13

Bump laravel/framework ^12.0 → ^13.0, laravel/tinker ^2.10 → ^3.0,
phpunit/phpunit ^11.5 → ^12.0, and php ^8.2 → ^8.3 (Laravel 13
minimum). No app code changes required: codebase has no
VerifyCsrfToken, JobAttempted/QueueBusy listeners, custom
Manager::extend, custom queue drivers, or model boot()
instantiation that the v13 breaking changes touch.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/composer.json

@@ -6,10 +6,10 @@
     "keywords": ["laravel", "framework"],
     "license": "MIT",
     "require": {
-        "php": "^8.2",
+        "php": "^8.3",
         "cocur/slugify": "^4.7",
-        "laravel/framework": "^12.0",
-        "laravel/tinker": "^2.10.1",
+        "laravel/framework": "^13.0",
+        "laravel/tinker": "^3.0",
         "league/commonmark": "^2.8",
         "livewire/livewire": "^3.7"
     },
@@ -21,7 +21,7 @@
         "laravel/sail": "^1.41",
         "mockery/mockery": "^1.6",
         "nunomaduro/collision": "^8.6",
-        "phpunit/phpunit": "^11.5.3"
+        "phpunit/phpunit": "^12.0"
     },
     "autoload": {
         "psr-4": {