Update Python Worker Version to x.y.z (e.g. 1.1.8)

Author: AzureFunctionsPython

azure_functions_worker/__init__.py

@@ -1,4 +1,4 @@
 # Copyright (c) Microsoft Corporation. All rights reserved.
 # Licensed under the MIT License.
 
-__version__ = '1.2.3'
+__version__ = 'x.y.z (e.g. 1.1.8)'