fix: equality check for iteratable data types

Author: majumdersubhanu

lib/src/form_builder_field.dart

@@ -1,3 +1,4 @@
+import 'package:flutter/foundation.dart';
 import 'package:flutter/widgets.dart';
 import 'package:flutter_form_builder/flutter_form_builder.dart';
 
@@ -185,7 +186,7 @@ class FormBuilderFieldState<F extends FormBuilderField<T>, T>
 
   void _informFormForFieldChange() {
     if (_formBuilderState != null) {
-      _dirty = value != initialValue;
+      _dirty = !_hasSameValue(value, initialValue);
       if (enabled || readOnly) {
         _formBuilderState!.setInternalFieldValue<T>(widget.name, value);
         return;
@@ -194,6 +195,19 @@ class FormBuilderFieldState<F extends FormBuilderField<T>, T>
     }
   }
 
+  bool _hasSameValue(T? currentValue, T? initialValue) {
+    if (currentValue is List && initialValue is List) {
+      return listEquals(currentValue, initialValue);
+    }
+    if (currentValue is Set && initialValue is Set) {
+      return setEquals(currentValue, initialValue);
+    }
+    if (currentValue is Map && initialValue is Map) {
+      return mapEquals(currentValue, initialValue);
+    }
+    return currentValue == initialValue;
+  }
+
   void _touchedHandler() {
     if (effectiveFocusNode.hasFocus && _touched == false) {
       setState(() => _touched = true);