[1.0.5] Fix signature

Update HandlePaymentNotification.php

[1.0.4] Add responseOk function to notification handler

Sometimes, Dpay will receive IPN as " OK", and it won't be marked as successfull notification, so this is a solution which I received from Dpay support.

[1.0.3] Add getters in notification handler, fix finding parameters

You may use now in Notification Handler specific getters:

$notification->getId();
->getAmount();
->getEmail();
->getType();
->getAttempt();
->getVersion();
->getCustom();

[1.0.2] Add TypeError handling in notification handler

add TypeError handling in notification handler

[1.0.1] Replace "echo" with "return" in SmsOperations in validating SMS code

replace echo to return in sms operations (verifyCode)

[1.0.0] First release

add readme