[FEATURE REQUEST] use the official ngrok api client

[come-maiz]

This project depends on https://github.com/kataras/tunnel.

Now there is an official ngrok client in https://github.com/ngrok/ngrok-api-go.

Please consider replacing this dependency with the official one. Contributing with this upstream project will be healthier and safer.

[kataras]

Hello @come-maiz, yes the new version of Iris already uses this and also is capable to connect to any SSH-tunnel.