add some phpstan array types

build/server-phar.php

@@ -45,6 +45,7 @@ function preg_quote_array(array $strings, string $delim = null) : array{
  * @param string   $stub
  * @param int      $signatureAlgo
  * @param int|null $compression
+ * @phpstan-param array<string, mixed> $metadata
  *
  * @return \Generator|string[]
  */