4.x gnp (#300)

* add camara auth module

* start adding gnp sim swap

* adding new gnp packages

* update camara auth

* add network packages

* finish adding network apis and prepare for release

* adjust verify v2 channel timeout and prepare for release

Add Number Verification API (#298)

* add number verification api

* adjust for encodings

* Bump version: 3.15.0 → 3.16.0

Add GNP Sim Swap API (#296)

* adding the structure

* add sim swap api

* Bump version: 3.14.0 → 3.15.0

* blackening file

prepare for new release

Add publisher only role (#295)

* add publisher-only role

* Bump version: 3.13.1 → 3.14.0

prepare for application api release

make compatible with Python 3.8

update dependency versions, prep for NI release

update readme for release

prepare for messages release