Function getMonthDays

getMonthDays(year, month): number
Returns the number of days in a non-leap month of lunar
Parameters
- year: number
  lunar year
- month: number
  lunar month
Returns number
Days in lunar non-leap month
Example
```
// => 29
getLeapMonth(2024, 12)
```
Example
```
// => 30
getLeapMonth(2025, 1)
```
Example
```
// => -1
getLeapMonth(1899, 13)
```
- Defined in src/get-month-days/index.ts:21