Function getLeapMonthDays

getLeapMonthDays(year): number
Returns days in a lunar leap month if there is a leap month in the year otherwise return 0
Parameters
- year: number
  lunar year
Returns number
Days in lunar leap month
Example
```
// => 29
getLeapMonthDays(2023)
```
Example
```
// => 0
getLeapMonthDays(2024)
```
- Defined in src/get-leap-month-days/index.ts:17