Fix tests by removing deprecated method

Author: onevdog

pubspec.lock

@@ -7,7 +7,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.5.0"
+    version: "2.8.1"
   boolean_selector:
     dependency: transitive
     description:
@@ -28,7 +28,7 @@ packages:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.1"
   clock:
     dependency: transitive
     description:
@@ -73,7 +73,7 @@ packages:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0"
+    version: "1.7.0"
   path:
     dependency: transitive
     description:
@@ -92,7 +92,7 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0"
+    version: "1.8.1"
   stack_trace:
     dependency: transitive
     description:
@@ -127,7 +127,7 @@ packages:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.19"
+    version: "0.4.2"
   typed_data:
     dependency: transitive
     description:

test/flutter_line_sdk_test.dart

@@ -4,7 +4,7 @@ import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter_line_sdk/flutter_line_sdk.dart';
 
 void main() {
-  WidgetsFlutterBinding.ensureInitialized();
+  TestWidgetsFlutterBinding.ensureInitialized();
   group('Models', () {
     test('access_token should be parsed correctly', () {});
   });
@@ -45,7 +45,8 @@ void main() {
   """;
 
   setUp(() {
-    channel.setMockMethodCallHandler((MethodCall methodCall) async {
+    TestDefaultBinaryMessengerBinding.instance!.defaultBinaryMessenger
+        .setMockMethodCallHandler(channel, (MethodCall methodCall) async {
       switch (methodCall.method) {
         case 'setup':
           return null;
@@ -99,6 +100,7 @@ void main() {
   });
 
   tearDown(() {
-    channel.setMockMethodCallHandler(null);
+    TestDefaultBinaryMessengerBinding.instance!.defaultBinaryMessenger
+        .setMockMethodCallHandler(channel, null);
   });
 }