Issue title: How to use multiple modifiers on the same JSX Eventhandler?
 Issue body: The following isn't working

```ts
...
onKeyup={m.enter(this.addTodo)}
onKeyup={m.esc(this.addTodo)} // JSX can't have 2 onKeyup
...
```

Can we some how chain the modifiers? like `onKeyup={m.enter.esc(this.addTodo)}` ?
 Comments: 
 Comment 0: [keys](/wonderful-panda/vue-tsx-support#keys) is available from v2.2.0.

```typescript
<div onKeyup={m.keys("enter", "esc")(this.addTodo)} />
```
 Comment 1: Awesome. 🎉
{'source': 'GithubIssues', 'repo_name_with_owner': 'wonderful-panda/vue-tsx-support', 'issue_id': 360622379, 'repo_stars': 482.0}