fix tests

Author: bossly

test/main_test.dart

@@ -11,7 +11,7 @@ import 'package:test/test.dart';
 // Unit tests for main.dart
 void main() {
   test('iOS icon list is correct size', () {
-    expect(ios.iosIcons.length, 15);
+    expect(ios.iosIcons.length, 21);
   });
 
   test('Android icon list is correct size', () {
@@ -21,7 +21,7 @@ void main() {
   test(
       'iOS image list used to generate Contents.json for icon directory is correct size',
       () {
-    expect(ios.createImageList('blah').length, 19);
+    expect(ios.createImageList('blah').length, 25);
   });
 
   test('pubspec.yaml file exists', () async {