[local_auth] Change stopAuthentication to return false instead of throwing on iOS. (flutter#5249)

Author: BeMacized

packages/local_auth/local_auth_ios/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 1.0.1
+
+* BREAKING CHANGE: Changes `stopAuthentication` to always return false instead of throwing an error.
+
 ## 1.0.0
 
 * Initial release from migration to federated architecture. 

packages/local_auth/local_auth_ios/lib/local_auth_ios.dart

@@ -81,8 +81,9 @@ class LocalAuthIOS extends LocalAuthPlatform {
   Future<bool> isDeviceSupported() async =>
       (await _channel.invokeMethod<bool>('isDeviceSupported')) ?? false;
 
+  /// Always returns false as this method is not supported on iOS.
   @override
   Future<bool> stopAuthentication() async {
-    throw UnimplementedError('stopAuthentication() is not supported on iOS.');
+    return false;
   }
 }

packages/local_auth/local_auth_ios/pubspec.yaml

@@ -2,7 +2,7 @@ name: local_auth_ios
 description: iOS implementation of the local_auth plugin.
 repository: https://github.com/flutter/plugins/tree/master/packages/local_auth/local_auth_ios
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+local_auth%22
-version: 1.0.0
+version: 1.0.1
 
 environment:
   sdk: ">=2.14.0 <3.0.0"

packages/local_auth/local_auth_ios/test/local_auth_test.dart

@@ -75,9 +75,9 @@ void main() {
       );
     });
 
-    test('stopAuthentication throws UnimplementedError', () async {
-      expect(() async => await localAuthentication.stopAuthentication(),
-          throwsUnimplementedError);
+    test('stopAuthentication returns false', () async {
+      final bool result = await localAuthentication.stopAuthentication();
+      expect(result, false);
     });
 
     group('With device auth fail over', () {