Update README.md

Author: Kuldeep Saxena

README.md

@@ -27,6 +27,7 @@ It's a library inspired by the [Angular's Reactive Forms](https://angular.io/gui
 * Nested forms.
 * Subscribers for value & status changes of controls.
 * Provides a set of validators & also supports custom sync & async validators.
+* `FormGenerator` api to create large forms with less code.
 * Better form management with `FormGroup` & `FormArray` apis.
 * Customizable update strategy for better performace with large forms.