add type hint and changelog entry

Author: xabbuh

src/Symfony/Component/Process/CHANGELOG.md

@@ -1,6 +1,11 @@
 CHANGELOG
 =========
 
+4.1.0
+-----
+
+ * added the `Process::isTtySupported()` method that allows to check for TTY support
+
 4.0.0
 -----
 

src/Symfony/Component/Process/Process.php

@@ -1164,10 +1164,8 @@ public function checkTimeout()
 
     /**
      * Returns whether TTY is supported on the current operating system.
-     *
-     * @return bool
      */
-    public static function isTtySupported()
+    public static function isTtySupported(): bool
     {
         static $isTtySupported;