fix(php8): take latest fix from msg91-php

Author: sudkumar

composer.json

@@ -29,7 +29,7 @@
     },
     "require": {
         "php": "^7.1.3|^8.0",
-        "craftsys/msg91-php": "^0.15.1",
+        "craftsys/msg91-php": "^0.15.2",
         "illuminate/support": "^5.2|^6.0|^7.0|^8.0"
     },
     "require-dev": {