Feature request: Add custom size to modal

[toreba]

I would like to write

<modal size="my-size" ...>

and get

<div role="document" class="modal-dialog modal-my-size">... </div>

This can be done by changing Modal.vue:98 (not tetsted)
computed: { modalSizeClass () { return 'modal-' + this.size }

Which component

Modal

[wxsms]

Pls ref to #43

[toreba]

Thanks. This solved my problem