Fix #7775: Stepper fix typescript add children

Author: melloware

components/lib/stepper/StepperBase.js

@@ -138,7 +138,8 @@ export const StepperBase = ComponentBase.extend({
         linear: false,
         onChangeStep: null,
         start: null,
-        end: null
+        end: null,
+        children: undefined
     },
     css: {
         classes,

components/lib/stepper/stepper.d.ts

@@ -96,7 +96,7 @@ export interface StepperChangeEvent {
  * Defines valid properties in Stepper component.
  * @group Properties
  */
-export interface StepperProps {
+export interface StepperProps extends Omit<React.DetailedHTMLProps<React.HTMLAttributes<HTMLDivElement>, HTMLDivElement>, 'ref'> {
     /**
      * Active step index of stepper.
      * @defaultValue 0
@@ -143,6 +143,11 @@ export interface StepperProps {
      * @defaultValue false
      */
     unstyled?: boolean;
+    /**
+     * Used to get the child elements of the component.
+     * @readonly
+     */
+    children?: React.ReactNode | undefined;
 }
 
 /**