💥 Upgrade to Flutter version 3

Migration Guide:

This release drops support for Flutter v2, and adds support for Flutter v3. Make sure to upgrade to Flutter v3 when upgrading to this version.

example/pubspec.lock

@@ -66,7 +66,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "0.4.2"
+    version: "0.4.3"
   flutter_web_plugins:
     dependency: transitive
     description: flutter
@@ -163,4 +163,4 @@ packages:
     version: "2.1.2"
 sdks:
   dart: ">=2.17.0-0 <3.0.0"
-  flutter: ">=2.0.0"
+  flutter: ">=3.0.0"

lib/flutter_web_auth.dart

@@ -36,8 +36,8 @@ class FlutterWebAuth {
       throw ArgumentError.value(callbackUrlScheme, 'callbackUrlScheme', 'must be a valid URL scheme');
     }
 
-    WidgetsBinding.instance?.removeObserver(_resumedObserver); // safety measure so we never add this observer twice
-    WidgetsBinding.instance?.addObserver(_resumedObserver);
+    WidgetsBinding.instance.removeObserver(_resumedObserver); // safety measure so we never add this observer twice
+    WidgetsBinding.instance.addObserver(_resumedObserver);
     return await _channel.invokeMethod('authenticate', <String, dynamic>{
       'url': url,
       'callbackUrlScheme': callbackUrlScheme,
@@ -50,6 +50,6 @@ class FlutterWebAuth {
   /// terminate all `authenticate` calls with an error.
   static Future<void> _cleanUpDanglingCalls() async {
     await _channel.invokeMethod('cleanUpDanglingCalls');
-    WidgetsBinding.instance?.removeObserver(_resumedObserver);
+    WidgetsBinding.instance.removeObserver(_resumedObserver);
   }
 }

pubspec.lock

@@ -149,4 +149,4 @@ packages:
     version: "2.1.2"
 sdks:
   dart: ">=2.17.0-0 <3.0.0"
-  flutter: ">=2.0.0"
+  flutter: ">=3.0.0"

pubspec.yaml

@@ -4,8 +4,8 @@ version: 0.4.3
 homepage: https://github.com/LinusU/flutter_web_auth
 
 environment:
-  sdk: ">=2.12.0 <3.0.0"
-  flutter: ">=2.0.0"
+  sdk: ">=2.17.0-0 <3.0.0"
+  flutter: ">=3.0.0"
 
 dependencies:
   flutter: