[bug] Get Current URL - Malformed HTTPS URL

[sebastianarca]

Hello ! I found a code error in the following line of file.
https://github.com/Ironikus/wp-webhooks/blob/master/core/includes/classes/class-wp-webhooks-pro-helpers.php#L329

For the evaluation of the parameter "on", it is necessary to add a conversion to lower or upper cases.
In the core of Wordpress it is indistinct to place the setting as ON, on or On.

Finding this error was complex, and I ask if you can correct it.

Thank you very much ! And I appreciate the patience with my rudimentary English