Update python port version.

Author: viferga

source/ports/py_port/setup.py

@@ -39,7 +39,7 @@
 	# Versions should comply with PEP440.  For a discussion on single-sourcing
 	# the version across setup.py and the project code, see
 	# https://packaging.python.org/en/latest/single_source_version.html
-	'version': '0.4.2',
+	'version': '0.5.0',
 
 	'description': 'A library for providing inter-language foreign function interface calls',
 	'long_description': long_description,