User Registration Stripe 1.3.8

* Enhance - Extra fields sync with stripe while customer creation.
* Enhance - Show tooltip in stripe gateway field label if enabled.
* Dev - Compatibility Quantity Field for stipe.
* Dev - Remove unwanted backward compatibility code.
* Fix - Multiple submit creates multiple subscription.

* Feature - Change card details from profile page.
* Fix - Confirmation Box for cancel subscription.
* Fix - PHP 8.0 Compatibility.

* Feature - Selection of payment method while registering.