touch events not working

None of the following touch events are firing at the moment, when set in bel:

`ontouchstart`
`ontouchmove`
`ontouchend`
`ontouchcancel`

Steps to reproduce (extending the minimal example):

```javascript
// list.js
var bel = require('bel');
var log = x => () => console.log(x)

module.exports = function (items) {
return bel`

${items.map(function (item) {
return bel`
• ${item}
`
})}

// app.js
var createList = require('./list.js')
var list = createList([
'grizzly',
'polar',
'brown'
])
document.body.appendChild(list)
```

The pointer events are successfully called upon click, but not the touch ones.

What is weirder is the fact that (in console):

```javascript
document.querySelector('ul').ontouchstart;
// () => console.log(x)
```
returns a valid callback, but this callback - so it is indeed registered, just never fires.