Add tests

Author: crazywhalecc

src/globals/test-extensions.php

@@ -19,7 +19,7 @@
 
 // If you want to test your added extensions and libs, add below (comma separated, example `bcmath,openssl`).
 $extensions = match (PHP_OS_FAMILY) {
-    'Linux', 'Darwin' => 'curl',
+    'Linux', 'Darwin' => 'iconv',
     'Windows' => 'amqp,apcu',
 };