feat: add Laravel 11/12 and PHP 8.3+ support

- Widen illuminate/* deps to ^10.0|^11.0|^12.0, require PHP ^8.3
- Upgrade PHPUnit to ^10.5|^11.0, Mockery to ^1.6
- Rewrite phpunit.xml.dist for PHPUnit 10+ format (source/include
  replaces filter/whitelist, removed deprecated attributes)
- Replace $dates with $casts on Token model
- Implement DeferrableProvider interface instead of $defer property
  on ClientServiceProvider
- Use FQCN route definitions instead of string-based namespace()
- Fix migration getColumnType() check for Laravel 11+ native types
- Replace @test doc annotations with #[Test] attributes
- Fix dynamic property deprecation in ControllerTest

database/migrations/2018_03_11_141103_create_quick_books_tokens_table.php

@@ -15,10 +15,9 @@
     public function up()
     {
         Schema::create('quickbooks_tokens', function (Blueprint $table) {
-            $user_id_type =
-                DB::getSchemaBuilder()->getColumnType('users', 'id') === 'bigint'
-                    ? 'unsignedBigInteger'
-                    : 'unsignedInteger';
+            $user_id_type = str_contains(DB::getSchemaBuilder()->getColumnType('users', 'id'), 'bigint')
+                ? 'unsignedBigInteger'
+                : 'unsignedInteger';
 
             $table->bigIncrements('id');
             $table->{$user_id_type}('user_id');