added device twin wrapper (#4)

* added device twin wrapper

Author: JanZachmann

CHANGELOG.md

@@ -5,6 +5,9 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.2.1] Q1 2022
+ - added iothub_device_client_ll.h for device twin access
+
 ## [0.2.0] Q1 2022
  - removed identity service
  - renamed package and repo to azure-iot-sdk-sys

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "azure-iot-sdk-sys"
-version = "0.2.0"
-edition = "2018"
+version = "0.2.1"
+edition = "2021"
 authors = ["Joerg Zeidler <joerg.zeidler@conplement.de>", "Jan Zachmann <jan.zachmann@conplement.de>"]
 build = "build.rs"
 repository = "https://github.com/ICS-DeviceManagement/azure-iot-sdk-sys"

wrapper.h

@@ -2,4 +2,5 @@
 #include <azureiot/iothub_client.h>
 #include <azureiot/iothub_message.h>
 #include <azureiot/iothub_module_client_ll.h>
+#include <azureiot/iothub_device_client_ll.h>
 #include <azureiot/iothubtransportmqtt.h>