fix bugs on MultiSelectBottomSheetField

lib/chip_display/multi_select_chip_display.dart

@@ -96,7 +96,7 @@ class MultiSelectChipDisplay<V> extends StatelessWidget {
               height: height ?? MediaQuery.of(context).size.height * 0.08,
               child: scrollBar != null
                   ? Scrollbar(
-                      isAlwaysShown: scrollBar!.isAlwaysShown,
+                      thumbVisibility: scrollBar!.isAlwaysShown,
                       controller: _scrollController,
                       child: ListView.builder(
                         controller: _scrollController,

lib/chip_field/multi_select_chip_field.dart

 import 'package:flutter/material.dart';
-import 'package:flutter/rendering.dart';
 import '../multi_select_flutter.dart';
 
 class MultiSelectChipField<V> extends FormField<List<V>> {
@@ -270,7 +269,7 @@ class __MultiSelectChipFieldViewState<V>
       _selectedValues.addAll(widget.initialValue!);
     }
     if (widget.scrollControl != null && widget.scroll)
-      WidgetsBinding.instance!.addPostFrameCallback((_) => _scrollToPosition());
+      WidgetsBinding.instance.addPostFrameCallback((_) => _scrollToPosition());
   }
 
   _scrollToPosition() {
@@ -379,7 +378,7 @@ class __MultiSelectChipFieldViewState<V>
                           MediaQuery.of(context).size.height * 0.08,
                       child: widget.scrollBar != null
                           ? Scrollbar(
-                              isAlwaysShown:
+                              thumbVisibility:
                                   widget.scrollBar!.isAlwaysShown,
                               controller: _scrollController,
                               child: ListView.builder(

lib/util/multi_select_actions.dart

@@ -22,9 +22,7 @@ class MultiSelectActions<V> {
   /// Calls the onConfirm function if one was provided.
   void onConfirmTap(
       BuildContext ctx, List<V> selectedValues, Function(List<V>)? onConfirm, int validationSelectedLength) {
-    if (selectedValues.length <= validationSelectedLength) {
     Navigator.pop(ctx, selectedValues); 
-    }
     if (onConfirm != null) {
       onConfirm(selectedValues);
     }

pubspec.lock

@@ -8,11 +8,7 @@ packages:
       sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
       url: "https://pub.dev"
     source: hosted
-<<<<<<< HEAD
     version: "2.11.0"
-=======
-    version: "2.5.0"
->>>>>>> parent of a863bcb (update gradle distribution url and remove validation length in action function)
   boolean_selector:
     dependency: transitive
     description:
@@ -28,18 +24,7 @@ packages:
       sha256: "04a925763edad70e8443c99234dc3328f442e811f1d8fd1a72f1c8ad0f69a605"
       url: "https://pub.dev"
     source: hosted
-<<<<<<< HEAD
     version: "1.3.0"
-=======
-    version: "1.1.0"
-  charcode:
-    dependency: transitive
-    description:
-      name: charcode
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.2.0"
->>>>>>> parent of a863bcb (update gradle distribution url and remove validation length in action function)
   clock:
     dependency: transitive
     description:
@@ -97,11 +82,7 @@ packages:
       sha256: a6e590c838b18133bb482a2745ad77c5bb7715fb0451209e1a7567d416678b8e
       url: "https://pub.dev"
     source: hosted
-<<<<<<< HEAD
     version: "1.10.0"
-=======
-    version: "1.3.0"
->>>>>>> parent of a863bcb (update gradle distribution url and remove validation length in action function)
   path:
     dependency: transitive
     description:
@@ -122,11 +103,7 @@ packages:
       sha256: "53e943d4206a5e30df338fd4c6e7a077e02254531b138a15aec3bd143c1a8b3c"
       url: "https://pub.dev"
     source: hosted
-<<<<<<< HEAD
     version: "1.10.0"
-=======
-    version: "1.8.0"
->>>>>>> parent of a863bcb (update gradle distribution url and remove validation length in action function)
   stack_trace:
     dependency: transitive
     description:
@@ -166,18 +143,7 @@ packages:
       sha256: "5c2f730018264d276c20e4f1503fd1308dfbbae39ec8ee63c5236311ac06954b"
       url: "https://pub.dev"
     source: hosted
-<<<<<<< HEAD
     version: "0.6.1"
-=======
-    version: "0.2.19"
-  typed_data:
-    dependency: transitive
-    description:
-      name: typed_data
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.3.0"
->>>>>>> parent of a863bcb (update gradle distribution url and remove validation length in action function)
   vector_math:
     dependency: transitive
     description:
@@ -195,4 +161,4 @@ packages:
     source: hosted
     version: "0.3.0"
 sdks:
-  dart: ">=3.2.0 <4.0.0"
+  dart: ">=3.2.0-194.0.dev <4.0.0"

pubspec.yaml

@@ -7,7 +7,7 @@ documentation: https://github.com/CHB61/flutter-multi-select
 homepage: https://github.com/CHB61/flutter-multi-select
 
 environment:
-  sdk: '>=3.2.0 <4.0.0'
+  sdk: '>=2.12.0 <3.0.0'
 
 dependencies:
   flutter: