Update password ask example to illustrate custom validation message

Author: AydinHassan

examples/input-password.php

@@ -8,6 +8,17 @@
 $itemCallable = function (CliMenu $menu) {
     $result = $menu->askPassword()
         ->setPlaceholderText('')
+        ->setValidator(function ($password) {
+            if ($password === 'password') {
+                $this->setValidationFailedText('Password is too weak');
+                return false;
+            } else if (strlen($password) <= 6) {
+                $this->setValidationFailedText('Password is not long enough');
+                return false;
+            } 
+            
+            return true;
+        })
         ->ask();
 
     var_dump($result->fetch());

src/Input/Password.php

@@ -81,9 +81,11 @@ public function getPlaceholderText() : string
         return $this->placeholderText;
     }
 
-    public function setValidator(callable $validator) : void
+    public function setValidator(callable $validator) : Input
     {
         $this->validator = $validator;
+        
+        return $this;
     }
 
     public function ask() : InputResult