.net 6 support

[PiotrJustyna]

I see there's already an issue about .net standard, but it's 2 years old now. It would be great to see this code updated to support more modern frameworks like .net 6.

The examples provided could use a great deal of simplification as well. At the moment the code is terribly bloated, too general and stateful. Most people are not going to use it to the full extent. It would be good to see more basic examples for those who are just quickly evaluating the product (in my case it was phoneid).

I wrote something like that in f#, feel free to use it: https://github.com/PiotrJustyna/telesign-client-fsharp-phoneid

[nunoguerreirorosa]

Any feedback in regards to the upgrade to net6?

[DenisDoroshko]

it's really weird to not upgrade to .net standard