Suap-notifica-govbr

* Added `NotificationsAPIClient.get_received_texts()`
* an optional `older_than` argument can be specified to retrieve all received texts older than the last
received text id. If omitted the first 250, the api limit, received texts will be returned, with links indicating how to retrieve the next page of results.
* Added `NotificationsAPIClient.get_received_texts_iterator()`
* returns all received texts by a generator object.

Changed

* Update to `NotificationsAPIClient.send_sms_notification()`
* added `sms_sender_id`: an optional `sms_sender_id` specified when adding SMS senders under service settings. If this is not provided, the SMS sender will be the service default SMS sender. `sms_sender_id` can be omitted.

* Update to `NotificationsAPIClient.send_email_notification()`
* added `email_reply_to_id`: an optional email_reply_to_id specified when adding Email reply to addresses under service settings, if this is not provided the reply to email will be the service default reply to email. `email_reply_to_id` can be omitted.

Added

* Added `NotificationsAPIClient.send_letter_notification()`:
* functions similarly to `send_sms_notification` and `send_email_notification`, however, address details are provided
in the personalisation dict
* See more details in the [README](https://github.com/alphagov/notifications-python-client#letter)

Changed

* Update to `NotificationsAPIClient.get_template(id)`:
* the `dict` returned has changed, learn more from the [README](https://github.com/alphagov/notifications-python-client#get-a-template-by-id).
* Update to `NotificationsAPIClient.get_template_version(id, version)`:
* the `dict` returned has changed, learn more from the [README](https://github.com/alphagov/notifications-python-client#get-a-template-by-id-and-version).
* Update to `NotificationsAPIClient.get_all_templates(template_type=None)`:
* the `dict` returned has changed, learn more from the [README](https://github.com/alphagov/notifications-python-client#get-all-templates)
* Replaced `NotificationsAPIClient.get_template_preview(id)` function with `NotificationsAPIClient.post_template_preview(id, persionalisation)`:
* See more details here [README](https://github.com/alphagov/notifications-python-client#generate-a-preview-template)

Changed

* `NotificationsAPIClient.get_all_notifications()`
* Notifications can be now be filtered by `reference`, see the README for details.
* NotificationList response has changed, see the [README](https://github.com/alphagov/notifications-python-client#get-the-status-of-all-messages-with-pagination) for details.