test: fix test compare values

Author: deandreamatias

test/src/form_builder_field_test.dart

@@ -183,7 +183,7 @@ void main() {
         await tester.pumpAndSettle();
         textFieldKey.currentState?.reset();
 
-        expect(textFieldKey.currentState?.initialValue, null);
+        expect(textFieldKey.currentState?.value, null);
       });
       testWidgets('Should reset to initial when call reset', (tester) async {
         const textFieldName = 'text';
@@ -200,7 +200,7 @@ void main() {
         await tester.pumpAndSettle();
         textFieldKey.currentState?.reset();
 
-        expect(textFieldKey.currentState?.initialValue, equals(initialValue));
+        expect(textFieldKey.currentState?.value, equals(initialValue));
       });
       testWidgets(
           'Should reset custom error when invalidate field and then reset',

test/src/form_builder_test.dart

@@ -301,7 +301,7 @@ void main() {
       await tester.pumpAndSettle();
       formKey.currentState?.reset();
 
-      expect(formKey.currentState?.initialValue, {});
+      expect(formKey.currentState?.instantValue, {textFieldName: null});
     });
     testWidgets('Should reset to initial when call reset', (tester) async {
       const textFieldName = 'text';
@@ -318,7 +318,7 @@ void main() {
       await tester.pumpAndSettle();
       formKey.currentState?.reset();
 
-      expect(formKey.currentState?.initialValue, equals(initialValue));
+      expect(formKey.currentState?.instantValue, equals(initialValue));
     });
     testWidgets(
         'Should reset custom error when invalidate field and then reset',