Feature/fix issue 9

[robiseb]

Feature #9 added.

It comes with a breaking change.

• data-call.params refers to custom parameters and is waiting a JSON format. This parameter is optional.
• Old $el and $event are deprecated. Those parameters are now automatically passed to the callback method.

Full exemple:

<button data-call="modal#register.open" data-call.params='[{ "myAttr": "myValue" }]'>do something</button>

<div id="register" is="modal">
  Some HTML
</div>

modulus.component('modal', class extends Component {
  run() {
    // ...
  }
  /**
   * Open modal and do some stuff
   *
   * @params {HTMLElement} el
   * @params {Event} e
   * @params {Object|null} [data]
   */
  open({ el, e, data }) {
    // el: <button ...>
    // e: Event{ ... }
    // data: { ... } | null
  }