Feature Request: support `.passive` modifier

[AngusFu]

Description

Seems that the modifier .passive is not yet supported?

<div vOn:scroll_passive={this.handleScroll}></div

Solution

The equivalent template

<div v-on:scroll.passive="handleScroll"></div>

will compiles to the following in template-explorer.vuejs.org:

function render() {
  with(this) {
    return _c('div', {
      on: {
        "&scroll": function ($event) {
          return handleScroll($event)
        }
      }
    })
  }
}

We can see the only difference is the prefix & (&scroll).

[AngusFu]

Is someone working on this project? @nickmessing