Update to match Uptime Kuma 2.x

[raaphhh]

Hey, just wondering if you had any plan to update the package to be compliant with the new Uptime Kuma 2?

[markus-seidl]

I've updated the monitors call for 2.x: #86

[freshpr]

Thank you @markus-seidl ! Works perfectly. My json monitors can be inserted automatically again