Fix CS rule (#1796)

Author: jderusse

.php-cs-fixer.php

@@ -63,7 +63,7 @@
         'short_scalar_cast' => true,
         'single_trait_insert_per_statement' => true,
         'ternary_to_null_coalescing' => true,
-        'trailing_comma_in_multiline' => false,
+        'trailing_comma_in_multiline' => ['after_heredoc' => true, 'elements' => ['array_destructuring', 'arrays']],
         'visibility_required' => true,
     ])
     ->setFinder($finder)