fix cart back button

lib/pages/pharmacies/screens/cart-page/cart-order-page.dart

@@ -9,6 +9,7 @@ import 'package:diplomaticquarterapp/pages/pharmacies/widgets/ProductOrderItem.d
 import 'package:diplomaticquarterapp/pages/pharmacy/pharmacyAddresses/PharmacyAddresses.dart';
 import 'package:diplomaticquarterapp/uitl/app_toast.dart';
 import 'package:diplomaticquarterapp/uitl/gif_loader_dialog_utils.dart';
+import 'package:diplomaticquarterapp/uitl/navigation_service.dart';
 import 'package:diplomaticquarterapp/uitl/translations_delegate_base.dart';
 import 'package:diplomaticquarterapp/uitl/utils.dart';
 import 'package:diplomaticquarterapp/widgets/buttons/GestureIconButton.dart';
@@ -20,6 +21,7 @@ import 'package:flutter/material.dart';
 import 'package:http/http.dart';
 import 'package:provider/provider.dart';
 
+import '../../../../locator.dart';
 import 'cart-order-preview.dart';
 
 class CartOrderPage extends StatefulWidget {
@@ -55,6 +57,9 @@ class _CartOrderPageState extends State<CartOrderPage> {
       isMainPharmacyPages: true,
       showPharmacyCart: false,
       baseViewModel: model,
+      backButtonTab: (){
+        widget.changeTab(0);
+      },
       backgroundColor: Colors.white,
       body: NetworkBaseView(
         isLoading: isLoading,

pubspec.yaml

@@ -43,7 +43,7 @@ dependencies:
   flutter_html: ^1.2.0
 
   # Pagnation
-  pull_to_refresh: ^1.6.2
+  pull_to_refresh: 1.6.2
 
   # Native
   flutter_device_type: ^0.2.0