CS-1750: Bump PHP version in README

Author: Nav

README.md

@@ -10,7 +10,7 @@ First add the library module to your project using composer. Add the following i
 
 ```json
 "require": {
-    "dapi-co/dapi-php": "^1.1",
+    "dapi-co/dapi-php": "^1.3",
 },
 ```