Vladislav Trotsenko

@TwiN Colud you fast review it? #487

This PR covers "Support severity for PagerDuty" feature: https://github.com/TwiN/gatus/issues/412

@Exagone313 Of course I'm active. I have received your comments just today. Thanks, let it be. So what the next actions?

@Exagone313 Sorry, today I'm not able to pair session. But we can combine our commits in the different branch and make a review.