chore: get rid of stepIndex in previous and next

Author: devrnt

src/types.ts

@@ -22,6 +22,12 @@ export type WizardValues = {
    * @param stepIndex Overwrite the default behaviour by providing a step index
    *  */
   previousStep: (stepIndex?: number) => void;
+  /**
+   * Go to the given step index
+   *
+   * @param stepIndex The step index, starts at 0
+   */
+  goToStep: (stepIndex: number) => void;
   /**
    * Attach a callback that will be called when calling `nextStep()`
    *