Merge pull request #166 from react-native-webrtc/fix_null_caller_name

Fix NSInvalidArgumentException when localizedCallerName is empty

Author: manuquentin

index.js

@@ -56,7 +56,7 @@ class RNCallKeep {
     return;
   };
 
-  displayIncomingCall = (uuid, handle, localizedCallerName, handleType = 'number', hasVideo = false) => {
+  displayIncomingCall = (uuid, handle, localizedCallerName = '', handleType = 'number', hasVideo = false) => {
     if (!isIOS) {
       RNCallKeepModule.displayIncomingCall(uuid, handle, localizedCallerName);
       return;