Add method to reset wizard

Closes #101

src/components/FormWizard.vue

@@ -1,5 +1,6 @@
 <template>
-  <div class="vue-form-wizard" :class="[stepSize, {vertical: isVertical}]" @keyup.right="focusNextTab" @keyup.left="focusPrevTab">
+  <div class="vue-form-wizard" :class="[stepSize, {vertical: isVertical}]" @keyup.right="focusNextTab"
+       @keyup.left="focusPrevTab">
     <div class="wizard-header">
       <slot name="title">
         <h4 class="wizard-title">{{title}}</h4>
@@ -75,6 +76,7 @@
   import WizardButton from './WizardButton.vue'
   import WizardStep from './WizardStep.vue'
   import {isPromise, findElementAndFocus, getFocusedTabIndex} from './helpers'
+
   export default {
     name: 'form-wizard',
     components: {
@@ -255,6 +257,13 @@
           tabs.splice(index, 1)
         }
       },
+      reset () {
+        this.maxStep = 0
+        this.tabs.forEach((tab) => {
+          tab.checked = false
+        })
+        this.navigateToTab(0)
+      },
       navigateToTab (index) {
         let validate = index > this.activeTabIndex
         if (index <= this.maxStep) {