Merge branch '4.4' into 5.1

* 4.4:
  [Intl] promote warnings to value errors on PHP 8
  Fix CS
  DateTime validator support for trailing data
  Remove some leftover for HHVM support
  Simplify code
  Fix tests on 5.6
  [Debug] Skip a test that was meant for HHVM.
  [Console] Silence warnings on sapi_windows_cp_set() call
  guard $argv + $token against null, preventing unnecessary exceptions

Author: xabbuh

Helper/QuestionHelper.php

@@ -112,7 +112,7 @@ private function doAsk(OutputInterface $output, Question $question)
 
         if (\function_exists('sapi_windows_cp_set')) {
             // Codepage used by cmd.exe on Windows to allow special characters (éàüñ).
-            sapi_windows_cp_set(1252);
+            @sapi_windows_cp_set(1252);
         }
 
         if (null === $autocomplete || !self::$stty || !Terminal::hasSttyAvailable()) {

Input/ArgvInput.php

@@ -45,9 +45,7 @@ class ArgvInput extends Input
 
     public function __construct(array $argv = null, InputDefinition $definition = null)
     {
-        if (null === $argv) {
-            $argv = $_SERVER['argv'];
-        }
+        $argv = $argv ?? $_SERVER['argv'] ?? [];
 
         // strip the application name
         array_shift($argv);