31 day in November

[Igor-Art]

jQuery: v3.2
Combodate v1.0.7
Chrome: 65.0.3325.181

smartDays: true
after ready: select any month -> select November -> display 31 day, need 30

in fillDay():

 var month = parseInt(this.$month.val(), 10); // is NaN
....
 if (!isNaN(month) && !isNaN(year)) {

if November is default then good (30 days). If reselect -> month is NaN
in this.$month option[value="10"] not selected
this.$month.val() //empty
or
this.$month.find('option:selected').val() // empty

Temp solution:
var month = parseInt(this.$month.val(), 10);
replace to
var month = parseInt(this.$month.find('option[selected="selected"]').val(), 10);

may be $(select).val() is not correct workly in jQuery