fix: cast Artisan command options to proper types for PHPStan

Author: abkrim

src/Commands/BookStackExportCommand.php

@@ -25,7 +25,8 @@ public function handle(BookStackSync $bookstack): int
         $type = (string) $this->argument('type');
         $id = (int) $this->argument('id');
         $formatStr = (string) $this->option('format');
-        $output = $this->option('output');
+        $outputOption = $this->option('output');
+        $output = is_string($outputOption) ? $outputOption : null;
 
         // Validate type
         if (! in_array($type, ['book', 'chapter', 'page'], true)) {

src/Commands/BookStackSearchCommand.php

@@ -18,7 +18,7 @@ class BookStackSearchCommand extends Command
 
     public function handle(BookStackSync $bookstack): int
     {
-        $query = $this->argument('query');
+        $query = (string) $this->argument('query');
         $limit = (int) $this->option('limit');
 
         $this->info("Searching for: \"{$query}\"");