Registration & Login with Mobile Phone Number 1.3.9

* new: Added Support for WhatsApp Meta Cloud API as an OTP provider.

* Dev: Verified compatibility with the latest WordPress and WooCommerce updates
* Fix: Scoped admin CSS class to prevent conflict with WordPress auto-update notices on the Plugins page

* new: added new css based loading animation.

* fix: minor bug fixed related to firebase app

* major code optimizations.
* added reCAPTCHA support for service providers other then firebase.

* Compatibility updated for latest versions of WooCommerce and WordPress.

Minor source update

* fixed various modal related issues

* Minor bug fixes

* Minor bug fixed regarding invalid saving settings when Canada or US is selected.