feat: improve php-cs rules with PSR-12 and trailing_comma_in_multiline (#27)

Co-authored-by: Anthony Tenneriello <[email protected]>

Author: antten

src/BedrockStreaming.php

@@ -18,6 +18,7 @@ public function __construct()
     public function getRules(): array
     {
         $rules = [
+            '@PSR12' => true,
             '@Symfony' => true,
             'array_syntax' => [
                 'syntax' => 'short',
@@ -41,6 +42,7 @@ public function getRules(): array
             'phpdoc_summary' => false,
             'single_line_throw' => false,
             'yoda_style' => false,
+            'trailing_comma_in_multiline' => ['elements' => ['arguments', 'arrays', 'match', 'parameters']],
         ];
 
         return $rules;