Update README.md

Author: thiagodp

README.md

@@ -5,6 +5,8 @@ This is a [Helper](https://codecept.io/helpers/) for [CodeceptJS](https://codece
 
 ## Install
 
+👉 Currently, this helper is compatible with CodeceptJS 1.2.1 and should work with any version `1.x`. However, it was not tested yet with versions `2.x`.
+
 ```bash
 npm install --save-dev codeceptjs-dbhelper
 ```