add reset event & update docs

Author: radeanu

docs/.vuepress/config.js

@@ -21,7 +21,7 @@ module.exports = {
         {
           title: 'GETTING STARTED',
           collapsable: false,
-          children: ['installation', 'using', 'props'],
+          children: ['installation', 'using', 'props', 'events'],
         },
         {
           title: 'EXAMPLES',

docs/events.md

@@ -0,0 +1,9 @@
+---
+title: 'Events'
+---
+
+Name | Desciption
+------------- | -------------
+@input | On input
+@change | On change value of selected date
+@reset | On click the clear button

src/components/datepicker.vue

@@ -353,6 +353,7 @@ export default {
     },
     resetDate () {
       this.selectedDate = this.defaultSelectedDate()
+      this.$emit('reset')
     },
     defaultSelectedDate () {
       return this.range ? [null, null] : null