Add ability to skip IRPT on contact modification
Add ability to skip IRPT on contact modification

Since this API call has only one extra parameter I made it as a boolean. @see https://manage.logicboxes.com/kb/node/777

I've tried it on my sandbox account and the request was formed corretly but their API returned:
```
{
    "status": "ERROR",
    "message": "You are not allowed to perform this action"
}
```
 
So I've contacted their support and they raised a ticket. Once the ResellerClub devs give us a response, I will merge this PR.

```
Hello,

I am escalating this issue to the concerned team.
We will check and update you on the same ticket.
Your patience is highly appreciated in the interim.

Thanks and regards,
Anagha.N
---
Ticket Details
Ticket ID: SGV-278-40173
Department: API
Type: Issue
```
amirkhiz/resellerclub-php-api