Update README.md

Author: TutorialsAndroid

README.md

@@ -15,7 +15,7 @@ update this library with some changes.**
 ![](https://github.com/TutorialsAndroid/KAlertDialog/blob/master/art/device-2019-03-23-132617.png)
 
 ## Note
-New version of library `4.4.19` require![API](https://img.shields.io/badge/API-21%2B-brightgreen.svg?style=flat)New version of this library doesn't support Old Android version.
+New version of library `15.4.19` require![API](https://img.shields.io/badge/API-21%2B-brightgreen.svg?style=flat)New version of this library doesn't support Old Android version.
 
 ## Setup
 The simplest way to use AlertDialog is to add the library as dependency to your build.