fix unified coupon expiration date

@@ -196,8 +196,9 @@ import AVFoundation
         showBarcodeButtonTopSpace.constant = 0
         // ===
         
-        if let earliestExpiration = coupon?._coupons.min(by: { ($0.expiration ?? "") < ($1.expiration ?? "") }) {
-            expirationLabel.text = "Το κουπόνι ισχύει έως " + (earliestExpiration.expiration ?? "")
+//        if let earliestExpiration = coupon?._coupons.min(by: { ($0.expiration ?? "") < ($1.expiration ?? "") }) {
+        if let latestExpiration = coupon?._coupons.max(by: { ($0.expiration ?? "") < ($1.expiration ?? "") }) {
+            expirationLabel.text = "Το κουπόνι ισχύει έως " + (latestExpiration.expiration ?? "")
         } else {
             expirationLabel.text = ""
         }

@@ -69,8 +69,9 @@ import UIKit
         )
         // + " αξίας " + String(activeCouponsDiscount) + "€"
         
-        if let earliestExpiration = activeCoupons.min(by: { ($0.expiration ?? "") < ($1.expiration ?? "") }) {
-            expirationLabel.text = "Ισχύει έως " + (earliestExpiration.expiration ?? "")
+//        if let earliestExpiration = activeCoupons.min(by: { ($0.expiration ?? "") < ($1.expiration ?? "") }) {
+        if let latestExpiration = activeCoupons.max(by: { ($0.expiration ?? "") < ($1.expiration ?? "") }) {
+            expirationLabel.text = "Ισχύει έως " + (latestExpiration.expiration ?? "")
         } else {
             expirationLabel.text = ""
         }