Support for Angular v14 and UntypedFormGroup

[Arberto99]

Angular v14 includes UntypedFormGroup, wich is a sort of an alias for FormGroup.

In the projects where I use verizonconnect/ngx-form-generator and Angular 14 I had a problem for this, but I solved it just by replacing the string "FormGroup" in "UntypedFormGroup".

But, since I use it in a script, I had to add the string replace manually inside the script.

It would be nice if the string was replaced directly in the app.

Thanks a lot!