updated readme

Author: msonowal

README.md

@@ -9,6 +9,9 @@ Supports Laravel 5.5 to 9.x
 This package makes it easy to send notifications using [textlocal](https://www.textlocal.in/) with Laravel 5.3.+
 
 
+To use version ^2.3.0 onwards will require PHP 8.0
+
+for other PHP version use upto ^2.2.0
 
 ## Contents