singular naming

Author: yurii-prykhodko-solid

lib/src/resources/customer.dart

@@ -1,7 +1,7 @@
 import 'dart:async';
 
 import 'package:stripe/messages.dart';
-import 'package:stripe/src/resources/sources.dart';
+import 'package:stripe/src/resources/source.dart';
 
 import '../client.dart';
 import '_resource.dart';
@@ -50,7 +50,7 @@ class CustomerResource extends Resource<Customer> {
 We recommend that you adopt the PaymentMethods API.
 This newer API provides access to our latest features and payment method types.
 ''')
-  SourcesResource sources(String customerId) {
-    return SourcesResource(_client, customerId);
+  SourceResource sources(String customerId) {
+    return SourceResource(_client, customerId);
   }
 }

lib/src/resources/sources.dart lib/src/resources/source.dartlib/src/resources/sources.dart renamed to lib/src/resources/source.dart

@@ -13,12 +13,12 @@ import '_resource.dart';
 We recommend that you adopt the PaymentMethods API.
 This newer API provides access to our latest features and payment method types.
 ''')
-class SourcesResource extends Resource<Subscription> {
+class SourceResource extends Resource<Subscription> {
   final String customerId;
 
   String get _resourcePath => 'customers/$customerId/sources';
 
-  SourcesResource(Client client, this.customerId) : super(client);
+  SourceResource(Client client, this.customerId) : super(client);
 
   Future<DataList<Source>> list() async {
     final map = await get(_resourcePath);