Added templateId in response schema of getEmailEventReport

Route: https://developers.sendinblue.com/reference#getemaileventreport-1
You will now receive templateId for events in the response of this route. templateId field will only be present in case of template based emails

Sample response

{
    "events": [
        {
            "email": "[email protected]",
            "date": "2020-11-03T18:15:23.000+05:30",
            "subject": "test",
            "messageId": "<[email protected]>",
            "event": "requests",
            "tag": "",
            "from": "[email protected]",
            "templateId": 1834
        }
    ]
}