Attribute "increment" is not working with duets date-picker 1.4.0

[guay]

Describe the bug
It seems that the attribute "increment" is not working with the open source version of duets date-picker. Is this a bug or intentional? If the latter is the case, it would make the date-picker useless in most cases.

Expected behavior
In your example page you show an example "Date picker with large increment" with a year's range of +/– 100 years, created with the attribute (increment="100"). As I understood the default is 10. This would be a most needed attribute for the open source version.