Force to supporting jalali calender

[m-farahmand]

I use this module to localizing mat-datepicker and in some cases it call functions without argument ( e.g. year() return Gregorian year ).

I want to know why year, month and ... functions return Gregorian instead of jalali when they call without argument.
Thank you for your effort

[fingerpich]

It's fixed in jalali-moment@3.1.2