Previously, Beta and Preview products were only included in the `alpha`
artifact. They are now being included in the main artifact to ease
product discoverability and the collective operational overhead of
maintaining multiple artifacts per library.

If you have questions or concerns, raise them in a Github issue and we
will be sure to address.

* Remove PyJWT version restriction

* PyJWT >= 1.5.1 issue traced

* Remove shipped certs

* Add tests

…386)

* Create dummy clients which will throw an exception when instantiated

* using obsolete clients and custom warning instead of deprecated

* converted warnings to exceptions

* Updated tests

* comment syntax

Allow user to turn off nbf generation in jwts

* [DEVX-5241] Add last_request and last_response to client.

* [DEVX-5241]  Add tests for last_request and last_response.

* [DEVX-5241] Setting last_request before the request is sent just in case.

* last_response and last_request are Twilio objects, tests to assert proper contructions and setting none on request exception

* update request validator to remove port numbers from https urls

* fix typo

* add request logging and hooking

* change urlencode to import from twilio.compat

* refactor rebase for PR#385

* Add serializer for list types

* Add tests

* Change parameter order