fix: change parameter handle to number (#39)

* fix: change parameter handle to number , call.argument("number") was undefined in HandleMethodCall for startCall case

* fix(ios): change handle to number

Author: Pierre-Monier

ios/Classes/CallKeep.m

@@ -88,7 +88,7 @@ - (BOOL)handleMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result {
         result(nil);
     }
     else if ([@ "startCall" isEqualToString:method]) {
-        [self startCall:argsMap[@"uuid"] handle:argsMap[@"handle"] contactIdentifier:argsMap[@"callerName"] handleType:argsMap[@"handleType"] video:[argsMap[@"hasVideo"] boolValue]];
+        [self startCall:argsMap[@"uuid"] handle:argsMap[@"number"] contactIdentifier:argsMap[@"callerName"] handleType:argsMap[@"handleType"] video:[argsMap[@"hasVideo"] boolValue]];
         result(nil);
     }
     else if ([@"isCallActive" isEqualToString:method]) {

lib/src/api.dart

@@ -104,19 +104,19 @@ class FlutterCallkeep extends EventManager {
     }
   }
 
-  Future<void> startCall(String uuid, String handle, String callerName,
+  Future<void> startCall(String uuid, String number, String callerName,
       {String handleType = 'number', bool hasVideo = false}) async {
     if (!isIOS) {
       await _channel.invokeMethod<void>('startCall', <String, dynamic>{
         'uuid': uuid,
-        'handle': handle,
+        'number': number,
         'callerName': callerName
       });
       return;
     }
     await _channel.invokeMethod<void>('startCall', <String, dynamic>{
       'uuid': uuid,
-      'handle': handle,
+      'number': number,
       'callerName': callerName,
       'handleType': handleType,
       'hasVideo': hasVideo