fix: missing export

Author: jogboms

lib/flutter_ravepay.dart

@@ -9,6 +9,7 @@ import 'package:flutter/services.dart';
 import 'package:flutter_ravepay/src/config.dart';
 import 'package:flutter_ravepay/src/result.dart';
 
+export 'src/card.dart';
 export 'src/config.dart';
 export 'src/meta.dart';
 export 'src/result.dart';

pubspec.yaml

@@ -1,6 +1,6 @@
 name: flutter_ravepay
 description: Flutter integration for Flutterwave's Rave payment platform.
-version: 0.2.0
+version: 0.2.1
 author: Jeremiah Ogbomo <jeremiahogbomo@gmail.com>
 homepage: https://github.com/jogboms/flutter_ravepay