multi_select_input does not mark selected options correctly

[matthewmcgarvey]

avram/src/lucky/ext/select_helpers.cr

Lines 31 to 34 in 9c8caec

	if value = field.value
	is_selected = value.includes?(option_value.to_s)
	bool_attrs << :selected if is_selected
	end

It calls .to_s on the option_value but the list of selected options coming from the attribute might be numbers.

The solution is to map the array to string values and compare that way like the single value comparison does

avram/src/lucky/ext/select_helpers.cr

Line 19 in 9c8caec

is_selected = option_value.to_s == field.param.to_s