Fix deprecated code

Author: sivaram7

src/App/ErrorHandler.php

@@ -31,7 +31,6 @@ class ErrorHandler
         E_USER_ERROR => 'User Error',
         E_USER_WARNING => 'User Warning',
         E_USER_NOTICE => 'User Notice',
-        E_STRICT => 'Strict Notice',
         E_RECOVERABLE_ERROR => 'Recoverable Error',
         E_DEPRECATED => 'Deprecated Functionality',
         E_USER_DEPRECATED => 'User Deprecated Functionality',

src/Config/Validator/Result/Error.php

@@ -34,7 +34,7 @@ class Error implements ResultInterface
      * @param string $suggestion
      * @param int|null $code
      */
-    public function __construct(string $message, string $suggestion = '', int $code = null)
+    public function __construct(string $message, string $suggestion = '', int | null $code = null)
     {
         $this->message = $message;
         $this->suggestion = $suggestion;

src/Config/Validator/ResultFactory.php

@@ -64,7 +64,7 @@ public function success(): Success
      * @param int|null $code
      * @return Error
      */
-    public function error(string $message, string $suggestion = '', int $code = null): Error
+    public function error(string $message, string $suggestion = '', int | null $code = null): Error
     {
         return new Error($message, $suggestion, $code);
     }

src/Service/Adapter/CredisFactory.php

@@ -25,7 +25,7 @@ class CredisFactory
      * @param string|null $password
      * @return Credis_Client
      */
-    public function create(string $server, int $port, int $database, string $password = null): Credis_Client
+    public function create(string $server, int $port, int $database, string | null $password = null): Credis_Client
     {
         return new Credis_Client(
             $server,