Null safety

README.md

@@ -1,9 +1,19 @@
-# flutter-incall-manager
+# flutter_incall_manager
 
 ## Port from [react-native-incall-manager](https://github.com/zxcpoiu/react-native-incall-manager)
 
 * Handling media-routes/sensors/events during a audio/video chat on Flutter
 
+add to pubspec:
+```
+flutter_incall: ^1.0.0
+```
+import
+
+```
+import 'package:flutter_incall/flutter_incall.dart';
+
+```
 
 ## API:
 

lib/flutter_incall_manager.dart

@@ -22,7 +22,7 @@ class IncallManager {
   Future<void> start(
       {bool auto = true,
       MediaType media = MediaType.AUDIO,
-      String ringback}) async {
+      String? ringback}) async {
     await _channel.invokeMethod('start', <String, dynamic>{
       'media': media == MediaType.AUDIO ? 'audio' : 'video',
       'auto': auto,
@@ -31,7 +31,7 @@ class IncallManager {
   }
 
   /// Stop InCallManager
-  Future<void> stop({String busytone}) async {
+  Future<void> stop({String? busytone}) async {
     await _channel
         .invokeMethod('stop', <String, dynamic>{'busytone': busytone});
   }

pubspec.yaml

@@ -17,4 +17,4 @@ flutter:
         pluginClass: FlutterIncallManagerPlugin
 
 environment:
-  sdk: ">=2.0.0-dev.68.0 <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"