Problem associated with leap year

[MR-Mostafa]

Hi,
I found out that this library uses an incorrect method for calculating leap years,
As an example:
This library shows Esfand month 1403 as 29 days, which is actually a 30-day month.
Additionally, I checked the jalaali-js library and found that it is calculating leap years correctly.

Demo:
https://js-r3ebqv.stackblitz.io

Correct:

Note:

List of leap years (problem is with the leap before the five-year leap)
As an example, the year 1408 is a five-year leap, and the leap before this year is 1403. or the year 1441 is a five-year leap, and the leap before this year is 1436.
There is no support for five-year leap years in this plugin, and all leap years are based on four-year leap years.

KabiseShamsi1206-1498-new.pdf