fix: pin requirement versions and bump project version to 0.2.1

Author: Jorilla Abdullaev

setup.py

@@ -6,7 +6,7 @@
 
 setup_args = dict(
     name='azure-iot-hub-api',
-    version='0.2.0',
+    version='0.2.1',
     description='Azure iot hub api with azure cli backend',
     long_description_content_type="text/markdown",
     long_description=README,
@@ -20,8 +20,8 @@
 )
 
 install_requires = [
-    'azure-cli',
-    'python-dateutil'
+    'azure-cli==2.71.0',
+    'python-dateutil~=2.9'
 ]
 
 if __name__ == '__main__':