Support for Verify API

[ecly]

I was unable to figure out exactly whether or not the Verify API was supported.

It feels as though some of it lies in the ExTwilio.ProgrammableChat.Service module, but it is not obvious to me how I would go about replicating the behaviour from the Phone Verification Workflow example from Twilio's docs.

[sheharyarn]

I have the same issue. I can't figure out how to use the Verify API using this package.

[danielberkompas]

I think this probably isn't supported currently. I'd happily accept PRs.

[lilayoung]

In case anyone is wondering, v. 1 of the Twilio Verify API is supported here currently.... https://github.com/365assistance/authy