1.21.0

• Feature - Added new Argentina payment method Efectivo #576
• Feature - Showing instalments on local currency #571
• Fix - Saving customer document when creating account on checkout #566
• Fix - Show one click button only if customer has document #567
• Fix - Removed ::class from same file that checks if php version is supported #568
• Fix - Added fake birthdate to payment data to prevent error on unconfigured merchants #569
• Fix - Overwriting libjs invalid expiry date error #572
• Fix - Saving document on redirect payment methods #574
• Fix - Fixed iframe resizer #575