Gravity Perks (Gravity Wiz) 2.3.12

Fixed several fatal errors that occurred when running older versions of Gravity Forms.
Fixed issue where unmet minimum requirements did not prevent GP_Plugin-based perks from initializing.
Updated minimum required version of Gravity Forms to fix fatal errors where GFAddon::meets_minimum_requirements() did not exist.

Updated licensing and updates API for significant performance improvements.

-Updated licensing and updates API for significant performance improvements.