xF2 Add-on [Xen-Soluce] Upgrade Coupons 2.1.2

Changed :

• N/A

Added :

• 100% discount. (@purdze #Suggestion)

Removed :

• N/A

Note :

• N/A

Changed :

• Plugin incompatibility with Gift add-on from NixFifty. (@PolaritySystems #Report)