Syntax request: Vue

Looking for support on syntax highlighting [Vue code](https://vuejs.org/v2/guide/single-file-components.html). It's basically the HTML syntax so likely easy to add.

Supported in Github Markdown too:
```vue
<template>
  <div class="hello">Hello World</div>
</template>

<script>
export default {};
</script>

<style scoped>
.hello {
  font-size: 12px;
}
</style>
```