fix: use C++ 17 compiler for ICU (#414)

* fix: use C++ 17 compiler for ICU

* wip

* hack CXX env var to force C++17

* test intl

* test intl

* add retry for CI test download

* patch

* separate intl with newer icu c++ patch

---------

Co-authored-by: crazywhalecc <jesse2061@outlook.com>

src/globals/test-extensions.php

@@ -13,7 +13,7 @@ declare(strict_types=1);
 
 // If you want to test your added extensions and libs, add below (comma separated, example `bcmath,openssl`).
 $extensions = match (PHP_OS_FAMILY) {
-    'Linux', 'Darwin' => 'uuid',
+    'Linux', 'Darwin' => 'intl,posix',
     'Windows' => 'mbstring,pdo_sqlite,mbregex',
 };