add array to parameter's options

[jaguirresza]

Add array to parameter's options and update html template.

[Ninigi]

Was looking for this option just today...
My current workaround is declaring the parameters like this:

with_options scope: [:fulfillable_items, " "], required: true do
  parameter :order_id, "The Order the items belong to."
  parameter :item_ids, "The Items to be fulfilled. "\
                                    "Must all belong to the same Order."
end

and then do the request with explicit params

my_params = { fulfillable_items: [item_1, item_2, ..., item_n] }
do_request(my_params)

The docs output looks something like this:

fulfillable_items[ ][order_id]    The Order the items belong to.

@JORGEAGUIRRE would your PR make this a little more elegant, or is it about something completely different?

[oestrich]

Closing due to age.