Calendar: Inconsistent @select-month values

[zkhan93]

Describe the bug

Event @month-change should return the same month range when changing with arrow keys or the drop down menu.
Currently it returns different values for the same month depending on the method.
Forward and Backwards arrows: 0-11
Drop down picker: 1-12

Reproducer

https://codesandbox.io/s/wonderful-hawking-zom2sn

PrimeVue version

2.9.2

Vue version

2.x

Language

ALL

Build / Runtime

Vue CLI App

Browser(s)

No response

Steps to reproduce the behavior

Click month forward and backward arrow, month will change from 0-11
Click on month to select month in drop down, month will change from 1-12

Expected behavior

Both methods should return the same number range

[zkhan93]

@tugcekucukoglu can we please include this in next 2.x release ?