Bug report

The 'oldValue' and 'newValue' of change event of RadioGroup are marked as of type Number, while they should be of type String.

Reproduction of the problem

1. Open the change event example from the API

Current behavior

It is written that the 'oldValue' and 'newValue' are of type Number, but the logged values are strings

Current TypeScript definition:

interface RadioGroupChangeEvent extends RadioGroupEvent {
        target?: JQuery;
        oldValue?: number;
        newValue?: number;
    }

Expected/desired behavior

It should be marked that the oldValue and newValue are Strings.

Environment

• Kendo UI version: 2021.1.330
• Browser: [all ]

Feature Request

It should be possible for the value of the RadioGroup to be set to zero.

Reproduction of the problem

https://dojo.telerik.com/@NeliKondova/ObIXuric

Current behavior

Currently, when the value of the RadioGroup is set to zero, not item is actually selected as a value. The value of the RadioGroup could be set to zero only if it is a string.

Expected/desired behavior

To be possible the value of the RadioGroup to be set to 0.

Environment
Kendo UI version: 2021.1.1118