Update README.md

Author: hojjatjafary

README.md

@@ -108,3 +108,4 @@ public static event Action<string> consumePurchaseFailedEvent;
 # Thanks
 - [mohsen-srn](https://github.com/mohsen-srn) for pointing out the AndroidManifest.xml issue in newer Unity versions.
 - [Hossynkoala](https://github.com/Hossynkoala) for fixing white keyboard issue in AndroidManifest.
+- [Mahdad-Baghani](https://github.com/Mahdad-Baghani) help with finding nullReference exception in Unity 2019.3.0f3.